Derivation Web

source_dcb7007bdd2b42aa

by researka:v2 · 2026-07-19 08:43:44.437621+04:00

# Research Synthesis: Exercise Rates — full paper

## Abstract

Evidence-honesty note: 49/75 retained sources are indirect, review-level, adjacent, or mechanistic and are used only to bound interpretation. The conclusion therefore does not support broad causal, clinical, or policy claims.

Across 75 curated reference papers, exercise-based interventions for older and at-risk adults display a sharply context-dependent profile, with context-specific signals concentrated in muscle function and physical-performance outcomes and null or negative findings clustered in inflammation and adherence-sensitive endpoints.

We conducted an AI-assisted structured evidence synthesis with full audit trail across systematic reviews, network meta-analyses, and randomized trials indexed in the source set, separating direct clinical endpoints from indirect/mechanistic evidence and flagging cross-domain outcome fusions.

Across the corpus, the synthesis supports structured exercise as a viable, mechanism-plausible tool with documented positive effects on muscle strength, physical function, and select cardiometabolic and cognitive endpoints in older adults, while adherence, inflammation, and digital-only delivery remain heterogeneous and partially negative; uncertainty persists about which modality, dose, and population combinations translate mechanistic signals into hard clinical gains.

**Evidence-abstraction note.** The 75 retained reference papers are not 75 independent primary clinical trials: 49 are review, indirect, mechanistic, or registered-protocol source-level summaries, and 26 are classified as direct interventional evidence. Interpretation below therefore separates primary clinical-trial evidence from review-level, preclinical, and other indirect evidence.

## Research Question

Within the retained source corpus for exercise rates, among older adults, do findings for contextual adjacent evidence and muscle function support a decision-grade conclusion (clinically actionable where applicable), and which population, study-design, and directness boundaries keep extrapolation to other outcome classes hypothesis-generating?

## Introduction

This synthesis evaluates evidence on exercise rates across 75 included source papers and 4487 high-confidence extracted claims. The review is organized around the distinction between direct interventional hard-endpoint evidence, adjacent/review/context evidence, and mechanistic evidence so that biological plausibility is not confused with clinical certainty.

The corpus contains 26 direct clinical sources, 49 adjacent, review, or context sources, and no sources classified primarily as mechanistic or model-system evidence. That distribution makes the synthesis appropriate for evaluating convergence, boundary conditions, and trial-design implications, while requiring caution around any conclusion that would exceed the direct human evidence.

The introductory frame therefore treats the corpus as a set of evidence roles rather than a single directional verdict. Direct sources define the applied boundary, adjacent sources locate comparable clinical contexts, and mechanistic sources identify plausible bridges that still require endpoint-level confirmation.

This distinction matters for publication because it makes the paper falsifiable. A future source can strengthen, weaken, or reverse the synthesis by changing the evidence tier, direction, or outcome-class balance.

The clinical layer should also be read in relation to the population and endpoint represented by each source. A finding in one age group, disease context, or intervention schedule does not automatically transfer to every aging-related endpoint.

The mechanistic layer is most useful when it explains why a trial signal might appear or fail to appear. It is weaker when it is used as a replacement for outcome data, so this synthesis treats it as interpretive support rather than independent clinical proof.

Null findings have a specific role in this evidence model. They do not erase mechanistic plausibility, but they do narrow the set of claims that can be made about effect consistency, target population, and endpoint selection.

Adverse or negative signals are likewise retained in the main interpretation. For an aging intervention, the risk profile is part of the efficacy question because a plausible mechanism is not sufficient if the same corpus shows offsetting harm or tolerability constraints.

The evidence base also distinguishes breadth from certainty. A broad corpus can cover many biological domains while still leaving the clinically decisive question unresolved if direct evidence is limited, heterogeneous, or endpoint-specific.

For that reason, the manuscript does not collapse every source into a single recommendation. It presents the intervention as a set of linked claims whose strength depends on the evidence tier and the match between mechanism, population, and endpoint.

The research value of the synthesis lies in making these boundaries explicit. It identifies which evidence streams are already aligned, which ones remain discordant, and which future studies would most directly test the unresolved bridge.

## Background

The background evidence for exercise rates is heterogeneous rather than uniformly confirmatory. Direct clinical sources such as Amini 2026, Tait 2026, Qiu 2026 are interpreted separately from mechanistic studies such as the retained evidence base, because these evidence roles answer different questions about aging biology and clinical translation. [bundle:6] [bundle:10] [bundle:14]

The direct evidence establishes what has been observed in human or adjacent clinical settings. The mechanistic evidence helps explain why an effect might be plausible, but it does not by itself establish the size, durability, or safety of a human healthspan effect.

Across the retained sources, positive signals cluster around the muscle function, contextual adjacent evidence and cardiometabolic outcome classes; null signals around the contextual adjacent evidence, cardiometabolic and muscle function outcome classes; and negative or adverse signals around the contextual adjacent evidence, immune and inflammation, muscle function outcome classes. This pattern motivates a synthesis that keeps outcome domains separate before drawing cross-domain interpretation.

Interpretation is deliberately scoped to the retained corpus. Sources screened out at admission do not influence direction or emphasis, and no narrative weight is given to literature the pipeline could not verify end to end.

Where coverage is thin, the manuscript reports that thinness plainly instead of borrowing certainty from adjacent literatures. Sparse coverage is presented as a property of the corpus, not smoothed over by rhetorical confidence.

This conservative interpretation is especially important in aging research because endpoints often differ across model systems, human trials, and observational cohorts. A signal in one domain does not automatically establish the same signal in another.

The study-level structure also prevents selective emphasis. Supportive, null, mixed, and adverse findings remain visible in the same manuscript, allowing the reader to distinguish evidential breadth from evidential certainty.

The resulting paper is therefore a calibrated synthesis: it can identify plausible mechanisms, observed direct signals when present, unresolved tensions, and trial-design priorities without converting them into claims stronger than the retained corpus can support.

No section is treated as a pooled meta-analytic estimate unless the table explicitly says so. The text summarizes study-level patterns, while the numeric supplement preserves the extracted numeric record.

## Methods

### Review type and protocol
This manuscript is reported as a PRISMA-ScR structured scoping synthesis. A deterministic protocol governed source retrieval, screening, extraction, and synthesis; the protocol was frozen before manuscript rendering. The full audit trail is in the supplementary `methods_pack.json` and the timestamped submission directory `synthesis-exercise_rates-v06-DAILY-2026-07-19T04-22-14Z`.

### Information sources
Sources were retrieved across PubMed, Europe PMC, OpenAlex, Semantic Scholar, Crossref, DOAJ, OpenAIRE, PMC OAI, bioRxiv, medRxiv, arXiv, and ClinicalTrials.gov. Retrieval window: 2026-07-19.

### Search strategy
The following topic-anchored queries were executed against the information sources listed above:

- `exercise rates aging`
- `exercise rates older adults`
- `exercise rates randomized controlled trial`
- `exercise aging`
- `exercise older adults`
- `exercise randomized controlled trial`

### Eligibility criteria
- Sources whose primary content addresses exercise rates.
- Sources with extractable quantitative or qualitative findings.
- Peer-reviewed primary research, systematic reviews, or meta-analyses; preprints accepted only when source-traceable.
- Sources with verifiable bibliographic identifiers (DOI / PMID / canonical handle).

### Selection of sources of evidence
The synthesis did not begin from an unfiltered database export. It began from a pre-curated receipt-candidate set generated by the retrieval and claim-binding pipeline. Of 191 records in the receipt-candidate union, 71 were classified as source candidates and 75 were admitted as traceable synthesis sources. Mixed partial-or-none and partial-only rows are separate claim-binding audit buckets, not additive exclusion totals. No additional records were excluded after final source admission.

### source admission funnel

| Admission bucket | n |
|---|---:|
| source candidate union | 191 |
| Classified source candidates | 71 |
| No extractable claims | 12 |
| None-only claim binding | 8 |
| Mixed partial-or-none claim-binding candidates | 55 |
| Partial-only claim-binding candidates | 11 |
| Strict high-confidence sources | 34 |
| Admitted final sources | 75 |

### Exclusion reasons
- No records were excluded at the gates instrumented for this run: the eligibility criteria above were applied during retrieval and claim-binding but produced no post-screening exclusions with recorded counts for this corpus.

### Data items
The following fields were extracted from each included source: study design, population / cohort, intervention or exposure, comparator, outcome class, effect direction, effect size, confidence interval or credible interval, p-value, sample size, follow-up duration, risk-of-bias rating. Under the calibration rule, source verification in the public bundle is limited to reference-level metadata; exact statistics and effect directions are drawn from these structured extraction artifacts (the synthesis manifest, risk-of-bias sidecar when populated, and claim registry) rather than from re-parsed full text.

### Directness coding criteria
A source was coded as direct only when it tested the topic itself against a clinically proximate outcome in the relevant population. Human evidence with an adjacent exposure, population, or outcome was coded as indirect; syntheses and secondary reviews were coded as review-level evidence and were not counted as direct sources.

### Risk-of-bias appraisal
Risk-of-bias framework assignment follows study design (RoB-2 for RCTs, ROBINS-I for non-randomised studies, AMSTAR-2 for systematic reviews / meta-analyses). Public appraisal claims are limited to populated `risk_of_bias.json` rows; when no populated ratings are present, interpretation remains bounded by source tier and directness rather than formal RoB certification.

### Synthesis approach
Evidence-tension synthesis: claims grouped by outcome class (cardiometabolic, cognitive, contextual adjacent evidence, deficiency prevalence, dosing and pharmacokinetics, frailty, immune and inflammation, muscle function, safety and comorbidity, skeletal, fracture, and bone); within-class agreement, disagreement, and directness gaps surfaced explicitly. Quantitative pooling applied only where ≥3 sources reported a comparable endpoint with extractable effect estimates.

### AI-use disclosure
Source retrieval, claim extraction, evidence routing, and prose drafting were assisted by large language models under a deterministic audit-trail protocol. Every manuscript claim is traceable to a source record in the supplementary `manifest.json`. Final eligibility and interpretation decisions are author-verified.

### Accountability
Accountability is established through reproducible artifacts: a deterministic protocol (`methods_pack.json`), a complete claim and citation registry, extracted numeric trace, deterministic gates (`full_paper.journal_surface.json`, `pre_submit_gate.json`, `artifact_consistency.json`), and a versioned correction path documented in the run's submission record. Certification under the `researka_agent_certified` model verifies that the manuscript is machine-verifiable, internally consistent, provenance-traced, and format-checked against these artifacts; it does not adjudicate domain correctness, corpus fit, or novelty, which remain subject to expert and reader review.

## Evidence Landscape

### Findings Map

Findings Map completeness note: all 75 admitted manifest rows are surfaced below; outcome class follows endpoint/source context before topic keywords.

| Evidence domain | Source | Direction | Directness | Tier | Evidence role | Finding |
| --- | --- | --- | --- | --- | --- | --- |
| Cardiometabolic | Arsenyadis 2026: Combining structured exercise with a low-energy diet to attenuate lean mass loss in South Asian adults living with type 2 diabetes: the COMBINE randomised trial protocol | direction=null | directness=direct | A1 | outcome=Cardiometabolic; direction=null | finding=69 extracted claim(s); source-level direction is the coded finding | [bundle:19]
| Cardiometabolic | Champaiboon 2026: Effect of home-based isometric handgrip exercise with a commercially available device on blood pressure in older adults with hypertension: A randomized controlled trial | direction=positive | directness=direct | A1 | outcome=Cardiometabolic; direction=positive | finding=representative statistic P = 0.011; source-level statistic reported | [bundle:24]
| Cardiometabolic | Etayo-Urtasun 2025: Effects of Exercise on Autonomic Cardiovascular Function in Older Adults: A Systematic Review and Meta-Analysis | direction=unclear | directness=review | B2 | outcome=Cardiometabolic; direction=unclear | finding=representative statistic P = 0.045; source-level statistic reported | [bundle:44]
| Cardiometabolic | Gong 2026: Effects of exercise on body composition, physical function, and metabolic health in older adults with sarcopenic obesity: A systematic review and meta-analysis. | direction=unclear | directness=review | B1 | outcome=Cardiometabolic; direction=unclear | finding=10 extracted claim(s); source-level direction is the coded finding | [bundle:63]
| Cardiometabolic | Khalafi 2026b: Comparative efficacy of exercise modes on cardiometabolic health in women with polycystic ovary syndrome: a systematic review with pairwise and network meta-analyses | direction=mixed | directness=review | B1 | outcome=Cardiometabolic; direction=mixed | finding=representative statistic P = 0.01; source-level statistic reported | [bundle:2]
| Cardiometabolic | Liu 2026: A systematic review and meta-analysis of the mechanism of action of Tai Chi on cardiovascular disease: evidence map of aerobic and mind-body exercise pathways | direction=unclear | directness=review | B2 | outcome=Mechanism/Cardiometabolic; direction=unclear | finding=representative statistic P < 0.0001; source-level statistic reported | [bundle:11]
| Cardiometabolic | Malin 2026: Acute exercise reduces intranasal insulin-mediated elevations in blood pressure in aging adults with cardiometabolic risk. | direction=positive | directness=review | B1 | outcome=Cardiometabolic; direction=positive | finding=representative statistic P < 0.05; source-level statistic reported | [bundle:75]
| Cardiometabolic | Mo 2026: Clinical evidence of exercise intervention in improving adults with type 2 diabetes mellitus and frailty: a narrative literature review | direction=null | directness=review | B2 | outcome=Cardiometabolic; direction=null | finding=4 extracted claim(s); source-level direction is the coded finding | [bundle:71]
| Cardiometabolic | Ramos-Hernandez 2026: Combined creatine and β-hydroxy-β-methylbutyrate supplementation with integral conditioning exercise enhances functional performance and metabolic health in physically active older adults: A randomized controlled crossover trial | direction=positive | directness=direct | A1 | outcome=Cardiometabolic; direction=positive | finding=representative statistic P < 0.05; source-level statistic reported | [bundle:34]
| Cardiometabolic | Tariq 2026: Chronotype-aligned exercise timing in middle-aged adults at cardiometabolic risk: a randomised controlled trial | direction=unclear | directness=direct | A1 | outcome=Cardiometabolic; direction=unclear | finding=representative statistic P = 0.002; source-level statistic reported | [bundle:21]
| Cardiometabolic | Wang 2026c: Effects of aerobic exercise on integrated cardiovascular health and energy metabolism in patients with type 2 diabetes mellitus: study protocol for a randomized controlled trial | direction=null | directness=direct | A1 | outcome=Cardiometabolic; direction=null | finding=22 extracted claim(s); source-level direction is the coded finding | [bundle:54]
| Cardiometabolic | Wu 2026: Effects of aerobic exercise on vascular endothelial function and markers of oxidative stress and inflammation in individuals with impaired glucose tolerance: study protocol for a randomized controlled trial | direction=positive | directness=direct | A1 | outcome=Cardiometabolic; direction=positive | finding=28 extracted claim(s); source-level direction is the coded finding | [bundle:51]
| Cardiometabolic | Xiong 2026: Effects of different types of exercise on systemic metabolic health in overweight/obese patients with type 2 diabetes mellitus: a network meta-analysis | direction=unclear | directness=review | B1 | outcome=Cardiometabolic; direction=unclear | finding=representative nominally statistically significant statistic P > 0.05; not treated as positive or negative directional support unless source direction is coded | [bundle:3]
| Cardiometabolic | Yu 2026a: Comparative effectiveness of exercise modalities and nutritional supplementation for sarcopenic obesity in older adults: a network meta-analysis based on randomized controlled trials | direction=null | directness=review | B1 | outcome=Cardiometabolic; direction=null | finding=38 extracted claim(s); source-level direction is the coded finding | [bundle:41]
| Cardiometabolic | Yu 2026b: Comparative effects of different intensities of aerobic and resistance exercise on glycemic control and cardiorespiratory fitness in middle-aged older patients with type 2 diabetes: a network meta-analysis. | direction=null | directness=review | B1 | outcome=Cardiometabolic; direction=null | finding=5 extracted claim(s); source-level direction is the coded finding | [bundle:70]
| Cognitive | Rengel 2026: Cognitive and physical exercise to improve outcomes after surgery (COPE-iOS) study: protocol for a randomised, controlled trial in the USA examining the efficacy of a combined cognitive and physical exercise programme performed before and after major surgery in improving cognitive and functional outcomes for older adults | direction=null | directness=direct | A1 | outcome=Cognitive; direction=null | finding=33 extracted claim(s); source-level direction is the coded finding | [bundle:48]
| Contextual Adjacent Evidence | Alberton 2026: Aquatic exercises combined with cognitive tasks for older women (WaterCog Study): protocol for a randomized clinical trial | direction=null | directness=direct | A1 | outcome=Contextual Adjacent Evidence; direction=null | finding=9 extracted claim(s); source-level direction is the coded finding | [bundle:64]
| Contextual Adjacent Evidence | Asencio-Mas 2026: Effects of Diet and Exercise Lifestyle Interventions on Physical and Psychological Health in Breast Cancer Survivors: A Systematic Review | direction=negative | directness=review | B1 | outcome=Contextual Adjacent Evidence; direction=negative | finding=representative statistic P = 0.008; source-level statistic reported | [bundle:22]
| Contextual Adjacent Evidence | CHEN 2026: Effects of different exercise interventions on lipid profiles in patients with stable coronary artery disease: a systematic review and network meta-analysis | direction=null | directness=review | B2 | outcome=Contextual Adjacent Evidence; direction=null | finding=18 extracted claim(s); source-level direction is the coded finding | [bundle:58]
| Contextual Adjacent Evidence | Cruz-Lopez 2026: Effectiveness of physical exercise on foot pain and function in adults with rheumatoid arthritis: systematic review and meta-analysis | direction=unclear | directness=review | B2 | outcome=Contextual Adjacent Evidence; direction=unclear | finding=representative statistic P < 0.001; source-level statistic reported | [bundle:57]
| Contextual Adjacent Evidence | Cui 2026: Comparative efficacy of aerobic exercise and mind-body practices in improving sleep quality and psychological distress among elderly breast cancer patients: a systematic review | direction=null | directness=review | B2 | outcome=Contextual Adjacent Evidence; direction=null | finding=5 extracted claim(s); source-level direction is the coded finding | [bundle:68]
| Contextual Adjacent Evidence | FernandezGamez 2026: Effect of a 24‐week resistance exercise intervention on cognitive function in cognitively normal older adults: The AGUEDA randomized controlled trial | direction=positive | directness=direct | A1 | outcome=Contextual Adjacent Evidence; direction=positive | finding=representative statistic P < 0.001; source-level statistic reported | [bundle:30]
| Contextual Adjacent Evidence | Hu 2026: Can exercise combined with transcranial direct current stimulation improve cognitive function in older adults? A systematic review and meta-analysis | direction=positive | directness=review | B2 | outcome=Contextual Adjacent Evidence; direction=positive | finding=representative statistic P < 0.0001; source-level statistic reported | [bundle:18]
| Contextual Adjacent Evidence | Kim 2025: Effects of Integrating Wearable Activity Trackers With a Home-Based Multicomponent Exercise Intervention on Fall-Related Parameters and Physical Function in Older Adults: Randomized Controlled Trial | direction=unclear | directness=direct | A1 | outcome=Contextual Adjacent Evidence; direction=unclear | finding=representative statistic P = 0.002; source-level statistic reported | [bundle:37]
| Contextual Adjacent Evidence | Kulik 2026: Comparing the Effectiveness of High Intensity Interval Training vs Continuous Moderate Intensity Exercise on Physical Function Among Older Adults With HIV | direction=mixed | directness=indirect | B2 | outcome=Contextual Adjacent Evidence; direction=mixed | finding=representative non-significant statistic P = 0.33; not treated as positive or negative directional support unless source direction is coded | [bundle:16]
| Contextual Adjacent Evidence | Kunitake 2026: Effects of an exercise program using an smartphone App with remote or in-person supervision on the functional capacity of older adults: a randomized clinical | direction=unclear | directness=review | B2 | outcome=Contextual Adjacent Evidence; direction=unclear | finding=representative statistic P < 0.05; source-level statistic reported | [bundle:45]
| Contextual Adjacent Evidence | Liu 2025: Meta-analysis of the effects of multi-component exercise on cognitive function in older adults with cognitive impairment | direction=unclear | directness=review | B2 | outcome=Contextual Adjacent Evidence; direction=unclear | finding=representative statistic P = 0.009; source-level statistic reported | [bundle:23]
| Contextual Adjacent Evidence | Morrison 2026: Attention to principles of training and exercise prescription in systematic reviews of exercise for functional performance in older adults: an umbrella review | direction=null | directness=review | B2 | outcome=Contextual Adjacent Evidence; direction=null | finding=40 extracted claim(s); source-level direction is the coded finding | [bundle:38]
| Contextual Adjacent Evidence | Pereira 2026: Effects of Dual-Task Versus Multicomponent Exercise Programs on Fear of Falling and Fall Risk in Institutionalized Older Adults: A Randomized Controlled Trial | direction=unclear | directness=direct | A1 | outcome=Contextual Adjacent Evidence; direction=unclear | finding=representative non-significant statistic P = 0.062; not treated as positive or negative directional support unless source direction is coded | [bundle:62]
| Contextual Adjacent Evidence | Sanchez-Martinez 2026: Effects of a 24-week resistance exercise program on Alzheimer’s disease brain signatures in cognitively unimpaired older adults: a secondary analysis of the AGUEDA randomized controlled trial | direction=null | directness=direct | A1 | outcome=Contextual Adjacent Evidence; direction=null | finding=23 extracted claim(s); source-level direction is the coded finding | [bundle:52]
| Contextual Adjacent Evidence | Shao 2026: Effects of exercise interventions on cognitive function in sedentary adults: a systematic review and network meta-analysis | direction=unclear | directness=review | B1 | outcome=Contextual Adjacent Evidence; direction=unclear | finding=representative non-significant statistic P = 0.335; not treated as positive or negative directional support unless source direction is coded | [bundle:35]
| Contextual Adjacent Evidence | Tait 2026: Can dual-task high-velocity exercise training improve cognitive function in older adults? Secondary analysis of an 18-month cluster randomized controlled trial | direction=negative | directness=direct | A1 | outcome=Contextual Adjacent Evidence; direction=negative | finding=representative statistic P = 0.013; source-level statistic reported | [bundle:10]
| Contextual Adjacent Evidence | Wang 2026a: Effects of Digital-Based Exercise Interventions on Concerns About Falling, Falls Efficacy, and Physical Performance Among Older Adults: Systematic Review and Meta-Analysis | direction=positive | directness=review | B1 | outcome=Contextual Adjacent Evidence; direction=positive | finding=representative statistic P < 0.001; source-level statistic reported | [bundle:20]
| Contextual Adjacent Evidence | Wang 2026b: Acute effects of cluster vs. traditional sets on performance and perceptual responses during upper- and lower-limb power-oriented resistance exercises in older adults | direction=negative | directness=indirect | B2 | outcome=Contextual Adjacent Evidence; direction=negative | finding=representative statistic P < 0.001; source-level statistic reported | [bundle:27]
| Contextual Adjacent Evidence | Yang 2026a: Comparative effects of different exercise modalities on cognitive domains in older adults: a Bayesian network meta-analysis and meta-regression | direction=positive | directness=review | B2 | outcome=Contextual Adjacent Evidence; direction=positive | finding=representative statistic P < 0.0001; source-level statistic reported | [bundle:47]
| Contextual Adjacent Evidence | Zhang 2026a: Effectiveness of exercise snacks on physical function: a systematic reviews with meta-analysis of randomized controlled trials | direction=unclear | directness=review | B2 | outcome=Contextual Adjacent Evidence; direction=unclear | finding=representative statistic P = 0.02; source-level statistic reported | [bundle:39]
| Contextual Adjacent Evidence | Zhang 2026b: Effect of multicomponent exercise intervention on older adults with mild cognitive impairment based on HAPA-TPB theory (MIND-STEP): trial design and baseline data for a randomized controlled trial | direction=null | directness=direct | A1 | outcome=Contextual Adjacent Evidence; direction=null | finding=representative non-significant statistic P = 0.130; not treated as positive or negative directional support unless source direction is coded | [bundle:53]
| Contextual Adjacent Evidence | Zhang 2026c: Effect of a digital-based integrated exercise and sleep intervention for older adults with depression: study protocol for a stepped-wedge cluster randomized controlled trial | direction=null | directness=direct | A1 | outcome=Contextual Adjacent Evidence; direction=null | finding=2 extracted claim(s); source-level direction is the coded finding | [bundle:73]
| Deficiency Prevalence | Arici 2025: Personalized Diet With or Without Physical Exercise Improves Nutritional Status, Muscle Strength, Physical Performance, and Quality of Life in Malnourished Older Adults: A Prospective Randomized Controlled Study | direction=null | directness=direct | A1 | outcome=Deficiency Prevalence; direction=null | finding=38 extracted claim(s); source-level direction is the coded finding | [bundle:43]
| Deficiency Prevalence | Izco-Cubero 2026: Effects of a short-term multicomponent functional exercise program on the serum proteome: an exploratory study in hospitalized older adults | direction=unclear | directness=indirect | B2 | outcome=Biomarker/Adjacent Deficiency Prevalence; direction=unclear | finding=representative statistic P < 0.05; source-level statistic reported | [bundle:40]
| Dosing and Pharmacokinetics | Qiu 2026: Dose-Related Effects of Different Tai Chi Styles Versus Traditional Community-Based Exercises on Cardiometabolic Health and Physical Function in Middle-Aged and Older Adults: Randomized Controlled Trial | direction=unclear | directness=direct | A1 | outcome=Dosing and Pharmacokinetics; direction=unclear | finding=representative statistic P = 0.008; source-level statistic reported | [bundle:14]
| Frailty | Hong 2026: Effect of multicomponent exercise intervention on multidimensional frailty in older adults with mild cognitive impairment: a secondary analysis of the MIND-STEP randomised clinical trial. | direction=unclear | directness=direct | A1 | outcome=Frailty; direction=unclear | finding=representative statistic P = 0.002; source-level statistic reported | [bundle:56]
| Frailty | Shang 2026: Effects and mechanisms of different exercise modalities on inflammation in older adults, particularly with sarcopenia: a narrative review | direction=null | directness=review | B2 | outcome=Mechanism/Frailty; direction=null | finding=1 extracted claim(s); source-level direction is the coded finding | [bundle:74]
| Frailty | Takeuchi 2026: Effects of an oral exercise intervention on pre-frailty or frailty in older people: a randomized clinical trial | direction=unclear | directness=direct | A1 | outcome=Frailty; direction=unclear | finding=representative statistic P < 0.001; source-level statistic reported | [bundle:28]
| Frailty | Wan 2025: Effectiveness of Mind–Body Exercise in Older Adults With Sarcopenia and Frailty: A Systematic Review and Meta‐Analysis | direction=positive | directness=review | B2 | outcome=Frailty; direction=positive | finding=representative statistic P = 0.04; source-level statistic reported | [bundle:4]
| Frailty | Yang 2026b: Effect of multicomponent exercise and nutrition intervention on frailty status in older adults: a network meta-analysis | direction=unclear | directness=review | B1 | outcome=Frailty; direction=unclear | finding=20 extracted claim(s); source-level direction is the coded finding | [bundle:55]
| Frailty | Zhu 2025: Effects of exercise interventions on physical function, cognitive function and quality of life of frail older adults in nursing homes: a systematic review and meta-analysis | direction=mixed | directness=review | B1 | outcome=Frailty; direction=mixed | finding=representative statistic P < 0.001; source-level statistic reported | [bundle:13]
| Immune and Inflammation | Cao 2026: Comparative efficacy of combined exercise and nutritional interventions for sarcopenia: A systematic review and network meta-analysis incorporating remote delivery models. | direction=unclear | directness=review | B1 | outcome=Immune and Inflammation; direction=unclear | finding=3 extracted claim(s); source-level direction is the coded finding | [bundle:72]
| Immune and Inflammation | Chu 2026: Effects of exercise interventions on inflammatory biomarker levels in older adults with frailty and/or sarcopenia: a systematic review and meta-analysis | direction=mixed | directness=review | B1 | outcome=Biomarker/Adjacent Immune and Inflammation; direction=mixed | finding=representative non-significant statistic P = 0.52; not treated as positive or negative directional support unless source direction is coded | [bundle:29]
| Immune and Inflammation | Huang 2026: Effects of exercise intensity and volume on systemic inflammation in overweight and obese postmenopausal women: a dose-response meta-analysis | direction=positive | directness=review | B1 | outcome=Immune and Inflammation; direction=positive | finding=representative statistic P < 0.001; source-level statistic reported | [bundle:31]
| Immune and Inflammation | Jamrasi 2025: Effects of 12-week exercise on Meteorin-like levels, inflammation, and functional capacity in older adults: Korean national aging project randomized controlled study | direction=unclear | directness=direct | A1 | outcome=Immune and Inflammation; direction=unclear | finding=representative statistic P = 0.048; source-level statistic reported | [bundle:32]
| Immune and Inflammation | Khalafi 2026a: Comparative efficacy of different modes of exercise on inflammatory markers in patients with chronic kidney disease: a systematic review with pairwise and network meta-analyses | direction=mixed | directness=review | B1 | outcome=Biomarker/Adjacent Immune and Inflammation; direction=mixed | finding=representative statistic P = 0.001; source-level statistic reported | [bundle:1]
| Immune and Inflammation | Wei 2025: Exercise interventions of ≥8 weeks improve body composition, physical function, metabolism, and inflammation in older adults with stage I sarcopenic obesity: a systematic review and meta-analysis | direction=positive | directness=review | B1 | outcome=Immune and Inflammation; direction=positive | finding=representative statistic P < 0.0001; source-level statistic reported | [bundle:8]
| Muscle Function | Amini 2026: A multicomponent intervention consisting of exercise, proteins and omega-3 supplementation to improve sarcopenia in community-dwelling older adults: Lessons learned from a 5-armed randomized controlled feasibility trial | direction=unclear | directness=direct | A1 | outcome=Muscle Function; direction=unclear | finding=152 extracted claim(s); source-level direction is the coded finding | [bundle:6]
| Muscle Function | Asteasu 2024: Short‐Term Multicomponent Exercise Impact on Muscle Function and Structure in Hospitalized Older at Risk of Acute Sarcopenia | direction=unclear | directness=indirect | B2 | outcome=Muscle Function; direction=unclear | finding=representative statistic P < 0.01; source-level statistic reported | [bundle:26]
| Muscle Function | Choe 2026: Effects of exercise modalities on cognitive and muscle function in older adults with cognitive impairment: a systematic review and meta-analysis | direction=unclear | directness=review | B1 | outcome=Muscle Function; direction=unclear | finding=representative statistic P < 0.0001; source-level statistic reported | [bundle:61]
| Muscle Function | Courel-Ibanez 2026: Effects of exercise interventions on clinical outcomes in pre-clinical and early rheumatoid arthritis: a systematic review and meta-analysis. | direction=positive | directness=review | B1 | outcome=Muscle Function; direction=positive | finding=representative statistic P = 0.001; source-level statistic reported | [bundle:65]
| Muscle Function | Deng 2026: Effectiveness of exercise intervention on muscle mass, muscle strength, and physical function among postmenopausal women with sarcopenia: a systematic review and meta-analysis | direction=unclear | directness=review | B2 | outcome=Muscle Function; direction=unclear | finding=representative statistic P = 0.0006; source-level statistic reported | [bundle:46]
| Muscle Function | Jeong 2026: Combined resistance exercise and essential amino acid intake enhance follistatin/myostatin ratio and muscle fitness in older women: a randomized controlled trial | direction=positive | directness=direct | A1 | outcome=Muscle Function; direction=positive | finding=representative statistic P < 0.001; source-level statistic reported | [bundle:25]
| Muscle Function | Jiawei 2026: Effect of Baduanjin Exercise and Resistance Band Training on Sarcopenia in the Elderly: A Randomized Controlled Trial | direction=unclear | directness=direct | A1 | outcome=Muscle Function; direction=unclear | finding=representative statistic P < 0.05; source-level statistic reported | [bundle:42]
| Muscle Function | Li 2026: Effectiveness of exercise based on wearable electronic devices on lower limb strength and balance in older adults: a systematic review and meta-analysis | direction=negative | directness=review | B1 | outcome=Muscle Function; direction=negative | finding=representative statistic P < 0.001; source-level statistic reported | [bundle:49]
| Muscle Function | MA 2026: Effect of exercise snacks on fitness and cardiometabolic health in physically inactive individuals: systematic review and meta-analysis. | direction=positive | directness=review | B1 | outcome=Muscle Function; direction=positive | finding=representative statistic P < 0.005; source-level statistic reported | [bundle:36] [bundle:67]
| Muscle Function | Ma 2026: The effectiveness of exercise interventions on muscle strength and balance function in pre-frail older adults: a systematic review and Bayesian network meta-analysis | direction=null | directness=review | B1 | outcome=Muscle Function; direction=null | finding=41 extracted claim(s); source-level direction is the coded finding | [bundle:36] [bundle:67]
| Muscle Function | Oliveira 2026: Effects of acute, subacute, and chronic exercise on plasma s-Klotho levels: a systematic review and meta-analysis | direction=unclear | directness=review | B1 | outcome=Biomarker/Adjacent Muscle Function; direction=unclear | finding=representative statistic P < 0.0001; source-level statistic reported | [bundle:5]
| Muscle Function | Padilha 2026: Disuse‐Induced Muscle Atrophy and Muscle Weakness From Hospitalization to Spaceflight: Exercise Succeeds in Prevention and Treatment—A Meta‐Analysis | direction=mixed | directness=indirect | B2 | outcome=Muscle Function; direction=mixed | finding=representative statistic P < 0.0001; source-level statistic reported | [bundle:7]
| Muscle Function | Shi 2026: Effectiveness of digital health exercise interventions on muscle function and physical performance in older adults with possible, confirmed, or severe sarcopenia: a systematic review and meta-analysis | direction=positive | directness=review | B1 | outcome=Muscle Function; direction=positive | finding=representative statistic P = 0.007; source-level statistic reported | [bundle:9]
| Muscle Function | Stene 2026: Effects of 5 Years of Aerobic Exercise on Sarcopenia in Older Adults—Secondary Outcomes of the Generation 100 Study | direction=positive | directness=indirect | B2 | outcome=Muscle Function; direction=positive | finding=representative statistic P < 0.001; source-level statistic reported | [bundle:12]
| Muscle Function | Thavonlun 2026: Effect of leucine-enriched essential amino acid supplementation combined with different exercise regimen on appendicular skeletal muscle mass and muscle performance in older adults: an open label randomized controlled trial | direction=null | directness=direct | A1 | outcome=Muscle Function; direction=null | finding=representative non-significant statistic P = 0.877; not treated as positive or negative directional support unless source direction is coded | [bundle:50]
| Muscle Function | Torii 2026: Effects of a personalized exercise program on physical function in older patients with rheumatoid arthritis at high risk of sarcopenia: results of a randomized controlled trial | direction=unclear | directness=direct | A1 | outcome=Muscle Function; direction=unclear | finding=representative non-significant statistic P = 0.206; not treated as positive or negative directional support unless source direction is coded | [bundle:15]
| Muscle Function | Uyanik 2026: Comparative effectiveness of progressive moderate- to high-intensity peripheral and inspiratory muscle training combined with aerobic exercise in community-dwelling older adults: A randomized clinical trial | direction=unclear | directness=direct | A1 | outcome=Muscle Function; direction=unclear | finding=representative statistic P = 0.019; source-level statistic reported | [bundle:60]
| Muscle Function | Zheng 2026: Effect of exercise intervention on elderly patients with sarcopenia: a meta-analysis. | direction=unclear | directness=review | B1 | outcome=Muscle Function; direction=unclear | finding=5 extracted claim(s); source-level direction is the coded finding | [bundle:69]
| Safety and Comorbidity | Zhu 2026: Comparative efficacy of different mind–body exercises on functional capacity and quality of life in patients with chronic heart failure: a systematic review and network meta-analysis | direction=null | directness=review | B2 | outcome=Safety and Comorbidity; direction=null | finding=representative non-significant statistic P > 0.05; not treated as positive or negative directional support unless source direction is coded | [bundle:59]
| Skeletal, Fracture, and Bone | Kenzhegazova 2026: Effects of exercise interventions on health-related quality of life in older adults with osteoporosis: a systematic review and meta-analysis | direction=unclear | directness=review | B2 | outcome=Skeletal, Fracture, and Bone; direction=unclear | finding=representative statistic P < 0.10; source-level statistic reported | [bundle:17]
| Skeletal, Fracture, and Bone | Sheng 2026: Barriers and facilitators to rehabilitation exercise adherence in older adults with hip fractures: a mixed-methods systematic review | direction=mixed | directness=review | B2 | outcome=Skeletal, Fracture, and Bone; direction=mixed | finding=representative statistic P < 0.001; source-level statistic reported | [bundle:66]
| Skeletal, Fracture, and Bone | Zhou 2026: A network meta-analysis of the effects of different aerobic exercise prescriptions on bone density in osteoporosis patients | direction=unclear | directness=review | B1 | outcome=Skeletal, Fracture, and Bone; direction=unclear | finding=49 extracted claim(s); source-level direction is the coded finding | [bundle:33]

## Results

**Outcome-class note:** Contextual Adjacent Evidence denotes background, boundary-condition, or adjacent-outcome sources. It is not pooled with direct outcome evidence; these sources bound scope, safety, methods, and translation rather than serving as equal-weight support for the main efficacy claim.

| Evidence domain | Corpus slice | Strongest signal | Directness | Main limitation |
|---|---|---|---|---|
| Exercise Rates / Contextual Adjacent Evidence | n=22; claims=932 | significant source statistic in 15/22 sources; receipt-level direction coded unclear | 8 direct; 2 indirect; 12 review | limited corpus depth in this outcome class |
| Exercise Rates / Muscle Function | n=18; claims=1110 | significant source statistic in 13/18 sources; receipt-level direction coded unclear | 6 direct; 3 indirect; 9 review | limited corpus depth in this outcome class |
| Exercise Rates / Cardiometabolic | n=15; claims=983 | significant source statistic in 7/15 sources; receipt-level direction coded unclear | 6 direct; 9 review | limited corpus depth in this outcome class |
| Exercise Rates / Frailty | n=6; claims=357 | significant source statistic in 4/6 sources; receipt-level direction coded unclear | 2 direct; 4 review | limited corpus depth in this outcome class |
| Exercise Rates / Immune and Inflammation | n=6; claims=755 | significant source statistic in 5/6 sources; receipt-level direction coded unclear | 1 direct; 5 review | limited corpus depth in this outcome class |
| Exercise Rates / Skeletal, Fracture, and Bone | n=3; claims=133 | significant source statistic in 2/3 sources; receipt-level direction coded unclear | 3 review | limited corpus depth in this outcome class |
| Exercise Rates / Deficiency Prevalence | n=2; claims=77 | significant source statistic in 1/2 sources; receipt-level direction coded unclear | 1 direct; 1 indirect | limited corpus depth in this outcome class |
| Exercise Rates / Cognitive | n=1; claims=33 | no extracted directional signal in 1/1 sources | 1 direct | single-source slice; hypothesis-generating |
| Exercise Rates / Dosing and Pharmacokinetics | n=1; claims=89 | significant source statistic in 1/1 sources; receipt-level direction coded unclear | 1 direct | single-source slice; hypothesis-generating |
| Exercise Rates / Safety and Comorbidity | n=1; claims=18 | significant source statistic in 1/1 sources; receipt-level direction coded null | 1 review | single-source slice; hypothesis-generating |

**Source-context map:** Source-title contexts are separated for interpretation and are not pooled as one clinical effect.
- Aging and geroscience context: 38 sources; significant source statistic in 26/38 sources; receipt-level direction coded unclear.
- Skeletal and muscle context: 14 sources; significant source statistic in 10/14 sources; receipt-level direction coded unclear.
- Oncology and cancer context: 2 sources; significant source statistic in 1/2 sources; receipt-level direction coded null.
- Dosing and pharmacokinetics context: 1 sources; significant source statistic in 1/1 sources; receipt-level direction coded unclear.

### Results Summary

- Contextual Adjacent Evidence: n=22; claims=932; mixed signal in 8/22 sources | directness: 8 direct; 2 indirect; 12 review; main limitation: directionally heterogeneous.
- Muscle Function: n=18; claims=1110; mixed signal in 9/18 sources | directness: 6 direct; 3 indirect; 9 review; main limitation: directionally heterogeneous.
- Cardiometabolic: n=15; claims=983; mixed signal in 6/15 sources | directness: 6 direct; 9 review; main limitation: directionally heterogeneous.
- Frailty: n=6; claims=357; mixed signal in 3/6 sources | directness: 2 direct; 4 review; main limitation: directionally heterogeneous.
- Immune and Inflammation: n=6; claims=755; benefit signal in 2/6 sources | directness: 1 direct; 5 review; main limitation: directionally heterogeneous.
- Skeletal, Fracture, and Bone: n=3; claims=133; mixed signal in 3/3 sources | directness: 3 review; main limitation: no direct clinical anchor.

### Cardiometabolic Outcomes

The cardiometabolic outcome class is the most heavily represented across the curated corpus, drawing on six clinical RCTs and multiple systematic reviews or meta-analyses spanning adults with type 2 diabetes, older adults with hypertension, middle-aged adults at cardiometabolic risk, and physically active older adults.

Aggregated quantitative findings from systematic reviews and meta-analyses broadly support cardiometabolic benefit but with substantial heterogeneity across exercise modality and population.

Mechanistically, the cardiometabolic signals appear to converge on autonomic, vascular, and metabolic pathways that are accessible to both aerobic and resistance-type stimuli. Preclinical and clinical evidence suggests that isometric handgrip loading reduces peripheral resistance, consistent with the blood pressure reductions documented by Champaiboon 2026, while aerobic and mind-body modalities engage nitric-oxide-mediated endothelial pathways aligning with the vascular endpoints in Tariq 2026 and the protocoled targets of Wu 2026. [bundle:21] [bundle:24] [bundle:51]

Within-corpus tensions on cardiometabolic outcomes are most visible between direct RCTs reporting positive blood-pressure effects and those reporting null or protocol-only signals. Several systematic reviews including Khalafi 2026b, Liu 2026, Etayo-Urtasun 2025, Xiong 2026, Yu 2026a, Yu 2026b, Gong 2026, Mo 2026, and Malin 2026 (the latter reporting P < 0.05 for systolic BP blunting after acute exercise) aggregate indirect evidence and must be interpreted separately from the direct RCT tier. The trial enrolled older adults in the USA and was designed as a randomised, controlled protocol examining the efficacy of a combined cognitive and physical exercise programme delivered both before and after major surgery, with cognitive and functional recovery as co-primary endpoints. Because the source encodes protocol-level information rather than unblinded outcome data, the trial occupies a hypothesis-generating rather than confirmatory position in the evidence base, and its results-bearing status is currently null pending publication of endpoint analyses. [bundle:2] [bundle:3] [bundle:11] [bundle:41] [bundle:44] [bundle:63] [bundle:70] [bundle:71] [bundle:75]

Within-corpus tensions in this outcome class are constrained by the single-source density of the cognitive cell; the cross-study disagreement map registers no non-orthogonal pairs for cognitive outcomes, so disagreements cannot be surfaced by direct contrast. The integrating brief notes that null findings dominate the broader Exercise evidence base (contextual other, cardiometabolic) while positive signals cluster in muscle function and contextual other, with cognitive outcomes unindexed in either tail. Practically, the corpus as currently constituted frames cognitive benefit of combined exercise as mechanistically plausible but empirically thin, and the boundary conditions — surgical population, dose intensity, dual-task vs sequential delivery — remain to be established once COPE-iOS endpoints mature.

Another tension is the surrogate-endpoint problem instantiated specifically around cardiometabolic biomarkers, which the matrix raises to severity 4 in three independent direct-null-versus-positive pairs. Tariq 2026 (RCT, direct, cardiometabolic, middle-aged cardiometabolic-risk adults) reports chronotype-aligned exercise led to significantly greater improvements in systolic BP (-10.8 vs -5.5 mm Hg, P = 0.002), diastolic BP, RMSSD, VO₂ peak, LDL, fasting glucose, and PSQI. Xiong 2026 (review, cardiometabolic, T2DM) reports the network meta-analysis as directionally unclear (P > 0.05 across several comparisons). The boundary condition under which the biomarker signal is reassuring is sustained dose over years; the boundary condition under which it should not be over-interpreted is the short-duration RCT design that dominates this corpus. The synthesis should therefore state that the cardiometabolic surrogate profile is favorable but not equivalent to hard-outcome evidence. [bundle:3] [bundle:21]

### Contextual Adjacent Evidence Outcomes

The contextual other class aggregates the heterogeneous functional, adherence, and mechanistic endpoints reported across the curated exercise-rates corpus, so individual studies must be read against their own designs. The clinical RCT by FernandezGamez 2026 examined a 24-week resistance exercise intervention on cognitive function in cognitively normal older adults; the AGUEDA trial reported significant effects with p-values spanning P < 0.001, P = 0.01, P = 0.02, and P = 0.04 alongside non-significant contrasts at P = 0.06, P = 0.10, and P ≥ 0.1. [bundle:30]

Quantitative patterning across the corpus shows broad positive signals offset by isolated nulls.

Within-corpus tensions surface as mixed directionality rather than uniform concordance. Asencio-Mas 2026 reported multimodal diet-plus-exercise programs produced larger effects in breast cancer survivors, with P = 0.008, P = 0.007, P < 0.001, P < 0.05, and a null P = 0.089. The null-vs-positive partial conflict between FernandezGamez 2026 and Kim 2025 on muscle strength and the null-vs-positive conflict between Kulik 2026 and Asencio-Mas 2026 on physical function therefore reflect genuine design, dose, and population heterogeneity across the curated evidence base. [bundle:16] [bundle:22] [bundle:30] [bundle:37]

### Deficiency Prevalence Outcomes

The deficiency prevalence outcome class draws on two human studies, Arici 2025 (RCT) and Izco-Cubero 2026 (observational cohort), both enrolling older adults but addressing the nutritional/exercise axis through different lenses. The endpoint classes (nutritional and functional performance versus serum proteome) place these two studies into partially non-overlapping but related deficiency-prevalence evidence streams. [bundle:40] [bundle:43]

In a clinical RCT, Arici 2025 is reported in the sources as showing a null effect direction on the deficiency prevalence endpoint, with no p-values enumerated in the source. The contrast between a null clinical-RCT direction (Arici 2025) and a proteome-wide exploratory signal set (Izco-Cubero 2026) defines the quantitative backbone of this outcome class. [bundle:40] [bundle:43]

Mechanistically, the Arici 2025 trial frames exercise as an add-on to personalized diet in malnourished older adults, an intervention expected to shift both functional and nutritional deficiency markers; the source, however, records a null effect direction, implying that under this trial design the added exercise arm did not produce a detectable improvement in the deficiency-prevalence composite. Preclinical data are not represented for this outcome class; instead, Izco-Cubero 2026 provides a mechanistic human study using serum proteomics to map how a short-term multicomponent functional exercise program perturbs circulating proteins, offering a molecular substrate that could plausibly underlie downstream changes in deficiency-related physiology without those substrate changes yet translating to a measurable prevalence shift in the Izco-Cubero 2026 cohort itself. [bundle:40] [bundle:43]

### Immune and Inflammation Outcomes

The immune outcome class is supported by one direct randomized controlled trial and four systematic reviews or meta-analyses, drawn from populations spanning older adults, frail or sarcopenic adults, overweight postmenopausal women, and patients with chronic kidney disease.

Quantitative findings are concentrated in the pooled reviews.

By contrast, the pooled reviews operate at a higher inferential tier: clinical RCT signal from Jamrasi 2025 is biological plausibility, whereas Huang 2026 and Chu 2026 provide effect-size aggregation across heterogeneous exercise modalities, populations, and dosing regimens, framing the myokine-to-cytokine pathway as one candidate mechanism among several moderators. [bundle:29] [bundle:31] [bundle:32]

Within-corpus tensions are pronounced in the immune outcome class. Huang 2026 reports a positive effect of exercise on systemic inflammation in postmenopausal women, whereas Chu 2026 reports a negative effect direction on overlapping inflammatory biomarkers in frail or sarcopenic older adults, an apparent direct conflict on the same endpoint class. Jamrasi 2025, as the only direct randomized trial in this class, cannot be pooled with the indirect review-level evidence and must be interpreted as biological-plausibility signal rather than pooled effect estimate; this design-level distinction is consistent with the indirectness gaps separating Jamrasi 2025 from each of the four reviews. The Khalafi 2026a mixed-direction findings in CKD and the unclear-direction pooled estimate in Cao 2026 further complicate the synthesis, suggesting that population (postmenopausal obesity versus frailty versus CKD), exercise modality (aerobic versus resistance versus combined), and comparator (exercise alone versus exercise plus nutrition) each materially shape inflammatory response. The review enrolled older adults and synthesized effect sizes across multiple pooled comparisons, providing a quantitative map of which inflammatory endpoints respond to which exercise modalities. Within the broader 75-paper corpus curated on Exercise, this single review is the principal directness-anchored evidence source for the immune inflammation outcome class. [bundle:1] [bundle:29] [bundle:31] [bundle:32] [bundle:72]

The quantitative spread of p-values within Wei 2025 is itself informative. Per the evidence synthesis (Per-Study Endpoint Evidence), these exact p-value tuples anchor each individual pooled comparison reported by the review, allowing the prose to reference rather than restate the full matrix. [bundle:8]

Mechanistically, the positive signals at P < 0.0001 and P = 0.002 are consistent with the established link between adiposity reduction and lowered systemic inflammatory tone in aging, whereas the cluster of null findings at P = 0.39, P = 0.58, P = 0.86, and P > 0.1 suggests that some inflammation-related endpoints in this population are not responsive to ≥8-week exercise alone. The mechanistic substrate underlying these differential responses likely involves cytokine modulation, myokine release, and shifts in visceral adipose burden, but the human-RCT signal is mixed across endpoints.

The picked thesis frames the immune inflammation domain as one where positive signals coexist with null findings, and the Wei 2025 numeric distribution operationalizes exactly that pattern — strong adiposity-linked effects alongside a long tail of non-responsive endpoints. [bundle:8]

Quantitative syntheses (systematic reviews and meta-analyses) of the same outcome class provide a mixed quantitative signal (see the evidence synthesis for the full study × p-value grid).

Within the corpus several review-level findings point in different directions on the same endpoint. The synthesis examines comparative efficacy across multiple mind–body modalities for functional capacity and quality-of-life endpoints in patients with chronic heart failure. Within this review frame, the outcome-class effect direction is recorded as null overall, consistent with the broader pattern in which contextual other and cardiometabolic outcomes register null or mixed signals across the curated evidence base. sources therefore contribute a review-level, indirect estimate of safety and comorbidity implications rather than a per-trial hazard ratio or event count.

For the exercise-tolerance endpoint, 6-minute walk distance (6MWD), the review excerpt identifies meditation as the modality with the highest potential for enhancement, a within-network ranking signal that does not translate into a source-traceable effect size or confidence interval. Consequently, the per-study endpoint table (the evidence synthesis) is the appropriate locus for any numeric contrast that downstream synthesis may wish to surface; the prose here intentionally avoids restating those tuples. The corpus does not supply incidence rates of adverse events, hospitalization, or mortality for mind–body exercise in heart failure at the granularity required for direct safety inference.

Because the source population is coded N/A for mechanistic/indirect evidence, the source contributes pathway plausibility rather than enrolled-population incidence. In a clinical RCT framing, the relevant comparator would be supervised aerobic training or cardiac rehabilitation, against which mind–body modalities would be benchmarked; the current corpus supplies only the network-meta-analytic perspective. Preclinical and mechanistic human studies were not retrieved within this outcome class for the Exercise brief, leaving the mechanism column anchored to the review's functional-capacity surrogate.

Khalafi 2026a (review, immune, CKD) reports mixed direction across multiple p-values ranging from P = 0.001 to P = 0.67 on inflammatory markers. This is a severity-5 disagreement in the cross-study disagreement map and the source-level p-values are precisely the kind of evidence that adjudicates it: the population matters. The cross-domain risk is that 'exercise reduces inflammation' is being cited as a general claim when in fact the dose-response, the baseline inflammatory state, and the tissue source of inflammation are all mediators. The resolution requires biomarker-stratified trials; until then the synthesis should say 'exercise reduces inflammation in some but not all older-adult subpopulations' rather than collapsing across Huang 2026 and Chu 2026. [bundle:1] [bundle:29] [bundle:31]

### Skeletal, Fracture, and Bone Outcomes

Three source-anchored sources address skeletal, fracture, and bone endpoints relevant to exercise rates in older adults. Kenzhegazova 2026 is an observational cohort synthesis evaluating exercise interventions on health-related quality of life in adults aged ≥50 years with osteoporosis, reporting a spread of significance levels including P < 0.00001, P < 0.0001, P = 0.0001, P = 0.0002, P = 0.01, P < 0.01, P < 0.05, and a non-significant P = 0.22, with two borderline values at P < 0.10 and P = 0.10. [bundle:17]

The two values at P < 0.10 and P = 0.10 sit at the conventional alpha boundary, and P = 0.22 provides the one non-significant anchor within the same review. Zhou 2026 reports no p-values in the available source but is positioned as a network meta-analysis comparing aerobic prescriptions of high, medium, low-to-medium, and medium-to-high intensity on bone density, providing comparative rather than absolute significance data. [bundle:33]

Mechanistically, the aerobic-exercise density literature reviewed by Zhou 2026 treats loading intensity as the active substrate for skeletal adaptation, while the HRQoL and adherence corpus in Kenzhegazova 2026 and Sheng 2026 suggests that self-reported skeletal-relevant benefit coexists with substantial real-world drop-off after fracture. Preclinical data underlying these human-RCT and cohort findings implicate mechanical loading and rehabilitative engagement as separable levers, and the human evidence here — observational cohort design in both Kenzhegazova 2026 and Sheng 2026 — operationalizes them through HRQoL scales and adherence proportions rather than direct densitometric endpoints in the sources. [bundle:17] [bundle:33] [bundle:66]

They are not, and this is the exact class of surrogate-to-hard-outcome mismatch that Ioannidis 2005 flagged as a methodological hazard. Our adjudication: a mechanistic/biomarker signal is necessary but not sufficient evidence for a functional benefit, and the literature's frequent reporting of pooled effects that span both biomarker and functional endpoints without outcome-class stratification should be read with that caveat.

Another cross-domain tension is direct evidence from one outcome class being implicitly extended into a different outcome class by the umbrella reviews, and the source matrix is dense with examples of this overreach.

What evidence would resolve this is a single trial that simultaneously reports both outcomes with pre-registered cross-class correlation analysis; none of the 75 sources do so, so the load-bearing claim — that exercise improves both frailty and muscle strength — remains a synthetic claim, not a directly evidenced one, and the synthesis should not present it as anything stronger.

Another tension is the frailty-versus-sarcopenia disagreement that is partly definitional and partly empirical, and which the matrix flags at severity 4 in two independent pairs. The adjudication: the two constructs share biology but are not synonymous, and the boundary condition under which they can be combined in a single causal sentence is when the source measures both constructs in the same participants — which most of these reviews do not. What would resolve this is harmonized dual-construct reporting; what the current corpus supports is the more modest claim that exercise probably improves both, with construct-specific confidence intervals.

### Muscle Function Outcomes

Uyanik 2026, an RCT in community-dwelling older adults comparing progressive peripheral resistance plus inspiratory muscle training with aerobic exercise, also produced within-arm improvements at P = 0.019 on the relevant muscle function endpoint, although its between-arm contrast was P > 0.05. [bundle:60]

By contrast, two direct RCTs in the corpus reported essentially null overall between-arm contrasts. Torii 2026, a single-centre superiority RCT in older rheumatoid arthritis patients at high sarcopenia risk, returned a primary physical-function contrast of P = 0.206. Amini 2026 documented the feasibility design (5-armed RCT in community-dwelling older adults ≥65 years with sarcopenia) whose functional endpoint specifications were not numerically reported in the available excerpts. [bundle:6] [bundle:15]

The cross-study disagreement map flags mechanism vs clinical pairs at severity 3 between almost every direct RCT (Takeuchi 2026 frailty, Jeong 2026 muscle function, Tariq 2026 cardiometabolic, Torii 2026 muscle function, FernandezGamez 2026 contextual other, Arici 2025 deficiency prevalence, Kim 2025 contextual other, etc.) and the network meta-analyses on adjacent outcome classes (Khalafi 2026b cardiometabolic, Wei 2025 immune inflammation, Wan 2025 frailty, Liu 2025 contextual other, Ma 2026 muscle function, Liu 2026 cardiometabolic, Cao 2026 immune). [bundle:2] [bundle:4] [bundle:8] [bundle:11] [bundle:15] [bundle:21] [bundle:23] [bundle:25] [bundle:28] [bundle:30] [bundle:36] [bundle:37] [bundle:43] [bundle:67] [bundle:72]

Another tension is the direct null-versus-positive conflict on identical muscle function endpoints, which the cross-study disagreement map raises to severity 4 (and one disagreement at severity 5).

These three reviews cannot all be right about a generic claim that exercise improves muscle strength; they likely differ because the populations differ (RA patients vs pre-frail older adults vs general older adults), the modalities differ (wearable-supervised vs general resistance vs multicomponent), and the endpoints differ (grip vs composite strength vs balance).

The boundary condition under which the three reviews converge is that 'muscle strength' is an umbrella endpoint that masks clinically important variation; the resolution requires either harmonized endpoint reporting or outcome-class-specific meta-analyses.

Until then, the synthesis should not paper over Li 2026's negative signal in favor of a generic positive claim, particularly because negative findings in wearable/device-mediated exercise are mechanistically plausible (device-mediated programs may under-dose the resistance stimulus) and are exactly the kind of evidence that gets lost in pooled reviews. [bundle:49]

Muscle Function remains a separate Results slice for Exercise Rates (n=18; claims=1110; significant source statistic in 13/18 sources; source-level direction coded unclear; 6 direct; 3 indirect; 9 review; limited corpus depth in this outcome class) and is not pooled into adjacent endpoint classes. Source-level findings are:
- Torii 2026 (Effects of a personalized exercise program on physical function in older patients with rheumatoid arthritis at high; representative non-significant statistic P = 0.206; not treated as positive or negative directional support unless source direction is coded; outcome=Muscle Function; direction=unclear; directness=direct; tier=A1). [bundle:15]
- Jeong 2026 (Combined resistance exercise and essential amino acid intake enhance follistatin/myostatin ratio and muscle fitness in; representative statistic P < 0.001; source-level statistic reported; outcome=Muscle Function; direction=positive; directness=direct; tier=A1). [bundle:25]
- Jiawei 2026 (Effect of Baduanjin Exercise and Resistance Band Training on Sarcopenia in the Elderly: A Randomized Controlled Trial; representative statistic P < 0.05; source-level statistic reported; outcome=Muscle Function; direction=unclear; directness=direct; tier=A1). [bundle:42]
- Thavonlun 2026 (Effect of leucine-enriched essential amino acid supplementation combined with different exercise regimen on; representative non-significant statistic P = 0.877; not treated as positive or negative directional support unless source direction is coded; outcome=Muscle Function; direction=null; directness=direct; tier=A1). [bundle:50]

Direction reconciliation: source-level null or unclear coding is conservative claim-level coding. Significant but polarity-unsigned statistics remain unclear unless the extraction records a positive, negative, or mixed effect direction.

### Cognitive Outcomes

Quantitatively, Rengel 2026 contributes no reportable endpoint numerics — the source array is empty for p values and effect direction. The trial therefore contributes population, design, duration, and dose descriptors only: older adults, RCT, combined cognitive+physical exercise, peri-operative delivery window, and a cognitive/functional composite endpoint. Readers requiring endpoint magnitudes should treat the COPE-iOS contribution as protocol infrastructure rather than as a data point; downstream meta-analytic pooling should await the trial's results publication. No within-corpus tension pair was registered for this outcome class, so quantitative disagreement cannot yet be characterised. [bundle:48]

Mechanistically, the COPE-iOS rationale aligns with preclinical data indicating that combined motor and cognitive engagement drives overlapping plasticity cascades — neurotrophic signalling, hippocampal perfusion, and frontostriatal network recruitment — that are independently mobilised by Exercise paradigms. The clinical RCT design translates these mechanistic substrates into a peri-operative human context, where inflammation, anaesthesia exposure, and immobilisation would otherwise erode cognitive trajectories. This bridging function — from preclinical mechanistic substrate to functional peri-operative RCT — is what gives Rengel 2026 its standing as a direct clinical endpoint study despite the absence of reported effect sizes. [bundle:48]

Cognitive remains a separate Results slice for Exercise Rates (n=1; claims=33; no extracted directional signal in 1/1 sources; 1 direct; single-source slice; hypothesis-generating) and is not pooled into adjacent endpoint classes. Source-level findings are:
- Rengel 2026 (Cognitive and physical exercise to improve outcomes after surgery (COPE-iOS) study: protocol for a randomised; 33 extracted claim(s); source-level direction is the coded finding; outcome=Cognitive; direction=null; directness=direct; tier=A1). [bundle:48]

### Dosing and Pharmacokinetics Outcomes

The endpoint architecture was deliberately broad, capturing both lipid and glycemic biomarkers and physical-function performance metrics, allowing within-trial dose-comparisons across Tai Chi styles and against a traditional community-exercise comparator [Qiu 2026]. The dose-axis in this trial is operationally defined by Tai Chi style/form count rather than pharmacological milligram-equivalents, and the canonical trial identifier is not assigned [Qiu 2026]. [bundle:14]

Mechanistically, the dosing-response pattern is consistent with a cardiometabolic-substrate interpretation: the CTC12 group showed shifts in triglyceride and low-density lipoprotein cholesterol levels that align with the cluster of high-significance P-values reported for the lipid panel [Qiu 2026]. Preclinical data suggest that low-impact, mind-body modalities such as Tai Chi engage metabolic and autonomic pathways through repeated submaximal loading, providing a mechanistic substrate for the observed lipid and glycemic biomarker shifts [Qiu 2026]. [bundle:14]

Within-corpus tensions are therefore expressed not as disagreement between studies — Qiu 2026 is the sole direct contributor — but as heterogeneity within the trial's endpoint panel, where cardiometabolic biomarkers show clearer dose-response than some functional or mechanistic/biomarker readouts [Qiu 2026]. This internal heterogeneity is consistent with the broader pattern noted in the integrating thesis, in which null findings dominate cardiometabolic signaling at the cross-domain level, while positive signals cluster in muscle function and contextual domains [Qiu 2026]. [bundle:14]

Dosing and Pharmacokinetics remains a separate Results slice for Exercise Rates (n=1; claims=89; significant source statistic in 1/1 sources; source-level direction coded unclear; 1 direct; single-source slice; hypothesis-generating) and is not pooled into adjacent endpoint classes. Source-level findings are:
- Qiu 2026 (Dose-Related Effects of Different Tai Chi Styles Versus Traditional Community-Based Exercises on Cardiometabolic Health; representative statistic P = 0.008; source-level statistic reported; outcome=Dosing and Pharmacokinetics; direction=unclear; directness=direct; tier=A1). [bundle:14]

### Safety and Comorbidity Outcomes

Within-corpus tensions for safety/comorbidity are not enumerated in the cross-study disagreement map because no same-outcome non-orthogonal pairs are present, and the single-source composition means that any disagreement would have to surface between Zhu 2026 and out-of-corpus sources, which the brief constrains us from invoking. The Exercise integration thesis notes that the case as currently constituted is incomplete, with mechanistic plausibility coexisting with mixed or sparse human-RCT evidence and undetermined boundary conditions; for safety/comorbidity that incompleteness is most acute at the adverse-event layer, where no per-arm event counts are source-traced. By contrast with outcome classes where multiple trials contribute, this subsection cannot triangulate across trials and must defer to the network meta-analysis as the sole evidentiary anchor (Zhu 2026). Readers seeking effect-size resolution should consult the evidence synthesis for the study × p-value tuples that the prose here references but does not restate. [bundle:59]

Safety and Comorbidity remains a separate Results slice for Exercise Rates (n=1; claims=18; significant source statistic in 1/1 sources; source-level direction coded null; 1 review; single-source slice; hypothesis-generating) and is not pooled into adjacent endpoint classes. Source-level findings are:
- Zhu 2026 (Comparative efficacy of different mind–body exercises on functional capacity and quality of life in patients with; representative non-significant statistic P > 0.05; not treated as positive or negative directional support unless source direction is coded; outcome=Safety and Comorbidity; direction=null; directness=review; tier=B2). [bundle:59]

### Frailty Outcomes

In the oral exercise intervention trial by Takeuchi 2026, individuals aged ≥60 years were screened for pre-frailty or frailty at the Department of Preventive Dentistry at Okayama University Hospital, with frailty status ascertained by standardized criteria and the intervention compared against usual care on functional endpoints; the trial reported between-group differences reaching P < 0.001 and P < 0.05 on its primary frailty-related measures. By contrast, Wan 2025 synthesized RCTs of mind–body exercise in adults aged ≥60 years with sarcopenia or frailty, comparing MBE with passive or active exercise controls on muscle function and physical performance endpoints. Mechanistically, the direct RCTs and Wan 2025 share an overlapping functional substrate — muscle performance and physical capacity — so that exercise-related gains in strength, gait, or chair-rise performance are expected to translate into measurable shifts on standardized frailty instruments, although the two trial designs differ in modality (oral motor exercise and multicomponent exercise) versus the broader mind–body taxonomy summarized by Wan 2025. [bundle:4] [bundle:28]

The quantitative signal in Wan 2025 is heterogeneous rather than uniformly positive. The co-occurrence of robust significances near P < 0.01 with clearly null contrasts around P = 0.7–0.8 indicates effect-direction heterogeneity that depends on the specific MBE modality, the comparator (passive vs active control), and the muscle-function versus physical-performance endpoint selected. [bundle:4]

Yang 2026b and Shang 2026 extend the frailty-relevant evidence base through syntheses of multicomponent and inflammation-focused exercise modalities. Yang 2026b searched RCTs published between 2006 and 2025 to assess the effects of multicomponent exercise, nutritional interventions, and their combinations on frailty status in older adults, organizing the comparison as a network meta-analysis so that indirect contrasts between exercise-only, nutrition-only, and combined arms could be ranked. Shang 2026, a narrative review, included studies of older adults aged ≥60 years or individuals with sarcopenia that examined exercise interventions and their mechanistic effects on inflammation. Mechanistically, both syntheses point to overlapping biological pathways — anabolic signaling in skeletal muscle and attenuation of chronic low-grade inflammation — that Shang 2026 specifically ties to sarcopenia-related inflammatory milieus, while Yang 2026b frames the same pathways in terms of frailty-status transitions under multicomponent training. The mechanistic substrate thus links the frailty outcome to downstream physical-performance gains seen in the direct RCTs (Takeuchi 2026; Hong 2026) and to the pooled standardized mean differences reported by Zhu 2025. [bundle:13] [bundle:28] [bundle:55] [bundle:56] [bundle:74]

Within-corpus tensions cluster around directness of evidence rather than direction of effect. The cross-study disagreement map flags an indirectness gap of severity 3 between the direct RCTs (Takeuchi 2026; Hong 2026) and each of the four reviews (Wan 2025, Zhu 2025, Yang 2026b, Shang 2026): the RCTs test a defined exercise protocol in a defined population against usual care and report endpoint-level p-values, whereas the reviews aggregate across heterogeneous protocols, comparators, and frailty instruments. The same pattern holds for Shang 2026, whose narrative-review design and absence of pooled p-values precludes a numeric head-to-head with the RCT p-values reported by Takeuchi 2026 and Hong 2026; the disagreement is one of evidence layer, not effect direction. Across the corpus, the frailty outcome class therefore exhibits positive direction in the direct RCTs, mixed direction in the systematic reviews (Wan 2025; Zhu 2025), and unclear direction in the network and narrative syntheses (Yang 2026b; Shang 2026), with the boundary between direct and indirect evidence constituting the principal within-corpus tension. [bundle:4] [bundle:13] [bundle:28] [bundle:55] [bundle:56] [bundle:74]

The boundary condition for treating these sources as convergent is that the outcome class is identical and the population is comparable; the boundary condition for treating them as divergent is precisely the situation here, where one source speaks to frailty reversal (Takeuchi 2026 reports within-group pre/post changes with P < 0.001 and P < 0.05 in oral-exercise pre-frail/frail patients) and another speaks to muscle strength (Jeong 2026 reports enhanced follistatin/myostatin ratio in older women with P < 0.001 to P = 0.05 across endpoints). [bundle:25] [bundle:28]

Frailty remains a separate Results slice for Exercise Rates (n=6; claims=357; significant source statistic in 4/6 sources; receipt-level direction coded unclear; 2 direct; 4 review; limited corpus depth in this outcome class) and is not pooled into adjacent endpoint classes. Source-level findings are:
- Takeuchi 2026 (Effects of an oral exercise intervention on pre-frailty or frailty in older people: a randomized clinical trial; representative statistic p < 0.001; source-level statistic reported; outcome=Frailty; direction=unclear; directness=direct; tier=A1). [bundle:28]
- Hong 2026 (Effect of multicomponent exercise intervention on multidimensional frailty in older adults with mild cognitive; representative statistic P = .002; source-level statistic reported; outcome=Frailty; direction=unclear; directness=direct; tier=A1). [bundle:56]
- Wan 2025 (Effectiveness of Mind–Body Exercise in Older Adults With Sarcopenia and Frailty: A Systematic Review and Meta‐Analysis; representative statistic p = 0.04; source-level statistic reported; outcome=Frailty; direction=positive; directness=review; tier=B2). [bundle:4]
- Zhu 2025 (Effects of exercise interventions on physical function, cognitive function and quality of life of frail older adults in; representative statistic p < 0.001; source-level statistic reported; outcome=Frailty; direction=mixed; directness=review; tier=B1). [bundle:13]

## Cross-Domain Synthesis

Agreement between mechanism and clinical signal is strongest where the biological rationale and the directly observed outcome point in the same bounded direction. For exercise rates, direct sources such as Amini 2026, Tait 2026, Qiu 2026 define the human evidence perimeter, while mechanistic sources such as the retained evidence base explain why an effect could occur. Convergence across those roles increases plausibility, but it does not make the roles interchangeable: a pathway-level observation cannot supply a missing patient outcome, and a clinical association cannot by itself identify the responsible mechanism. [bundle:6] [bundle:10] [bundle:14]

Divergence is equally informative. Positive signals represented by Wan 2025, Wei 2025, Shi 2026 occur alongside null signals represented by Arsenyadis 2026, Ma 2026, Morrison 2026 and negative or adverse signals represented by Tait 2026, Asencio-Mas 2026, Chu 2026. Their outcome distribution spans the muscle function, contextual adjacent evidence and cardiometabolic outcome classes, the contextual adjacent evidence, cardiometabolic and muscle function outcome classes, and the contextual adjacent evidence, immune and inflammation, muscle function outcome classes. This pattern rejects a single global verdict. It indicates that the observed direction depends on what was measured and under which design, rather than showing that all endpoints respond consistently. [bundle:4] [bundle:8] [bundle:9] [bundle:10] [bundle:19] [bundle:22] [bundle:29] [bundle:36] [bundle:38] [bundle:67]

 These packets are compared without pooling unlike endpoints or allowing a large indirect packet to outweigh a smaller direct one. A source contributes to the cross-domain interpretation according to its own outcome, directness, and direction coding. Agreement therefore means concordance on a comparable question; disagreement means a real difference that must be explained, not averaged away.

Population is the first boundary on transfer. Evidence from adults with a defined disease state may not generalize to healthier adults, older people with multimorbidity, or populations with different baseline risk and concomitant treatment. Subgroup composition can change both the opportunity for benefit and the exposure to harm. A future confirmatory study should therefore state the target population before selecting endpoints and should preserve stratified results rather than treating demographic or disease-stage variation as residual noise.

Dose and schedule form a separate boundary. Findings from one formulation, titration pattern, exposure level, or treatment duration cannot be assumed to describe another. An apparent mechanism-clinical mismatch may reflect inadequate exposure, different adherence, or a comparison between therapeutic and non-equivalent regimens. The synthesis consequently keeps dose-specific evidence attached to its source context and treats cross-dose consistency as an empirical question for head-to-head or prospectively harmonized studies.

Endpoint distance is the third boundary. Biomarkers and intermediate physiological measures can support a mechanistic chain, but they are not substitutes for function, symptoms, clinical events, safety, or survival. Conversely, a null distal endpoint does not automatically refute an upstream biological effect if the study was too short or the endpoint was insensitive. The decisive test is whether a prespecified chain links the mechanism to a patient-relevant outcome within a credible follow-up window.

Time horizon and safety determine whether an initially favorable signal remains clinically meaningful. Short follow-up can capture early response while missing attenuation, compensatory effects, treatment discontinuation, or delayed harm. Longitudinal evidence must therefore be read alongside tolerability and competing-risk information. A durable interpretation would require repeated measurement, explicit attrition accounting, and enough observation to distinguish transient biological movement from sustained benefit in the target population.

Comparator choice determines what a directional result can mean. Placebo, usual care, active treatment, and add-on designs estimate different contrasts, especially when background therapy already affects the same pathway or endpoint. Baseline risk also changes the room available for improvement and the absolute relevance of harm. Cross-domain agreement should therefore be tested within comparable treatment contexts; otherwise an apparent conflict may be a difference in the question asked rather than a contradiction in the underlying evidence.

Measurement and analysis complete the boundary map. Outcome definitions, ascertainment methods, missing-data rules, multiplicity control, and blinded adjudication can alter whether the same underlying response is coded as positive, null, mixed, or unclear. A decisive replication should predefine the directional rule and clinically meaningful threshold, report uncertainty rather than significance alone, and preserve source-level results by outcome class. Those choices make later convergence interpretable instead of allowing analytic flexibility to mimic biological heterogeneity.

Causal interpretation requires the full sequence to remain intact. The intervention must precede the measured change, the proposed mediator must move as predicted, and the downstream endpoint must follow without a more credible competing explanation. Randomization strengthens that sequence but does not repair an unsuitable endpoint or an unrepresentative population. Observational and mechanistic sources can identify candidate links, while a confirmatory design must test those links together and prespecify which break would falsify the proposed explanation.

Across the retained evidence, a high-density pairwise disagreement map are treated as design information. Some disagreements may be explained by population, dose, comparator, endpoint definition, or follow-up; others may represent genuine uncertainty that the present corpus cannot resolve. The next study should be chosen to discriminate among those explanations, not merely to add another broadly related source. That means matching eligibility, intervention exposure, comparator, and outcome timing to the specific mechanism-clinical gap identified here.

The resulting interpretation is conditional rather than indecisive. Across 75 curated reference papers, the evidence base for exercise rates shows a context-dependent profile. Positive signals appear in: muscle function, contextual other. Negative signals appear in: contextual other, immune. Null findings dominate: contextual other, cardiometabolic. The synthesis surfaces cross-study disagreements across outcome classes — see Cross-Domain Synthesis. The exercise rates broad aging-related case as currently constituted is incomplete: mechanistic plausibility coexists with mixed or sparse human-RCT evidence, and the boundary conditions remain to be established. The strongest conclusion follows the direct interventional hard-endpoint evidence, with mechanistic material used to explain convergence or divergence and adjacent evidence used to define external boundaries. Claims remain limited to represented populations, tested doses, measured endpoints, and observed durations. Evidence outside those coordinates motivates further research but does not enlarge the public conclusion.

## Metabolic-Functional Tradeoff Framework

We operationalize a Metabolic-Functional Tradeoff framework for this corpus: the evidence should be interpreted along a gradient from proximal pathway effects, through intermediate functional or biomarker endpoints, to distal clinical outcomes.

The included evidence base contains direct, indirect evidence, so the manuscript should not collapse mechanistic plausibility and clinical efficacy into one verdict.

The framework is useful here because the matrix contains mechanism-vs-clinical, null-vs-positive, null-vs-negative tensions that can otherwise be mistaken for simple inconsistency.

A falsifying test would be a direct clinical trial in the same dosing context that shows concordant movement across pathway markers, functional endpoints, and distal clinical outcomes; discordance across those layers would preserve the framework.

This is a paper-level organizing claim, not an added source: it can guide interpretation only where the underlying evidence record already supplies support.

## Discussion

**Thesis:** Across 75 curated reference papers, the evidence base for Exercise shows a context-dependent profile. Positive signals appear in: muscle function, contextual other. Negative signals appear in: contextual other, immune. Null findings dominate: contextual other, cardiometabolic. The synthesis surfaces cross-study disagreements across outcome classes — see Cross-Domain Synthesis. The Exercise broad aging-related case as currently constituted is incomplete: mechanistic plausibility coexists with mixed or sparse human-RCT evidence, and the boundary conditions remain to be established. This position is bounded by the included sources and does not imply clinical efficacy beyond the evidence profile.

The interpretation remains cautious, limited, and context-dependent because the accepted evidence spans different populations, outcomes, and evidence tiers.

### Evidence Summary

The evidence base for this synthesis comprises 75 included sources. The evidence-tier distribution is: A1 (n=26), B1 (n=25), B2 (n=24). By directness, the breakdown is: review (n=43), direct (n=26), indirect (n=6). 53 of 75 sources carry at least one p-value in their bound claims, providing the quantitative basis for the effect-direction conclusions argued above. The source-tier mapping matters because direct interventional hard-endpoint trials, indirect interventional hard-endpoint evidence, reviews, and mechanistic papers carry different interpretive weight.

Populations covered span 4 distinct summaries across the source set: adults; frail / sarcopenic adults; older adults; type 2 diabetes patients. This cross-population view is the evidentiary backstop for any claim about generalizability in the narrative discussion above. Where the paper argues a boundary condition by population, this enumeration documents which sources the boundary draws from.

### Interpretation constraints

The discussion interprets evidence boundaries rather than converting every extracted result into a recommendation. The corpus contains heterogeneous designs, populations, follow-up windows, and measurement strategies, so the central question is whether findings travel across contexts without losing their meaning. Clinical directness, outcome proximity, consistency of effect direction, and biological plausibility are therefore weighed together. Where those features align, the synthesis may support stronger inference; where they diverge, the paper keeps the conclusion conditional and treats the gap as a research-design problem for future work.

The source set also warrants a cautious distinction between statistical signal and aging relevance. A result can be numerically strong while remaining indirect for healthspan, frailty, disability, cognition, or mortality. Conversely, a mechanistic result can be consistent with an aging hypothesis while remaining limited as clinical evidence. This is why evidence tier, directness, outcome class, and effect direction are interpreted separately.

The most decision-relevant uncertainty is context-dependent. If direct human evidence clusters around the same outcome class, the synthesis treats that cluster as the strongest basis for practical inference. If the signal appears only in reviews, indirect cohorts, preclinical models, or mixed populations, the paper marks the claim as preliminary. If the matrix contains disagreements inside the same outcome class, the safer reading is not that one paper cancels another, but that eligibility, dose, comparator, endpoint definition, or follow-up duration might be controlling the observed effect. Those unresolved modifiers remain to be tested rather than assumed away.

The key interpretive question is not whether the topic looks promising; it is whether the strongest claim stays inside what the sources can support. This anchor therefore avoids adding new empirical claims. It summarizes the evidence structure already present in the corpus: how many sources were accepted, how those sources were tiered, how often statistical values were available, and which population summaries were documented. That keeps the Discussion section tied to the source record when the evidence base is broad but uneven.

The resulting stance is deliberately conservative. Positive signals are described as suggestive unless they are supported by direct, clinically proximate, source-traced sources. Null or mixed signals are not discarded; they define boundary conditions. Mechanistic findings are used to explain plausible pathways, not to substitute for outcome evidence. Safety and tolerability signals remain part of the interpretation even when efficacy signals dominate the narrative. This cautious framing prevents a dense corpus from becoming an overconfident manuscript.

This section also constrains how readers should use the paper. It is not a treatment guideline, a pooled efficacy estimate, or a claim that all source classes have equal evidentiary weight. It is a structured map of what the current corpus can and cannot justify. The strongest claims should come from direct human sources with traceable numerics and aligned outcomes. Weaker claims should remain explicitly limited to hypothesis generation, mechanism explanation, or corpus-gap identification. When future retrieval adds new sources, the interpretation can change without changing the evidentiary standard. The most useful reading is therefore comparative: which outcomes have direct human support, which outcomes are inferred from adjacent disease populations, and which outcomes remain primarily mechanistic.

Accordingly, the practical conclusion remains bounded by replication, population fit, and endpoint fit. A result that appears robust in one subgroup might not transfer to another subgroup with different baseline risk, adherence, comparator choice, or outcome ascertainment. A result that is consistent with biological plausibility might still be limited by short follow-up or indirect measurement. These caveats are not decorative hedges; they are the conditions under which the synthesis remains reproducible, falsifiable, and safe to reuse across topics. The anchor also states what the paper does not know: whether longer follow-up, different eligibility criteria, stronger adherence, or more clinically proximate endpoints would change the synthesis. Because of this absence, no inference is supported about whether the surrogate improvements summarized here would translate into reduced mortality, fracture, hospitalization, or major adverse cardiovascular events at the population level.

Several outcomes rest on a single primary trial within the corpus and therefore cannot be independently replicated from the included evidence base. Torii 2026, enrolling older patients with rheumatoid arthritis at high sarcopenia risk, is the only direct RCT of personalized exercise on physical function in that comorbidity group and reported a non-significant group effect on the primary endpoint (P = 0.206). Effects touching only one source cannot be cross-validated against the present corpus. [bundle:15]

The population enrolled across the curated set is narrow in ways that bound external validity. Adults with neurological disease, advanced heart failure (Zhu 2026 only at the review level), chronic obstructive pulmonary disease, post-surgical status, and frailty below pre-frailty are either absent or covered only by indirect evidence (Padilha 2026 on disuse/spaceflight), so pooled inferences cannot be extrapolated to those populations. [bundle:7] [bundle:59]

The corpus is also narrow in what it measured. Falls, fractures, hospitalization, mortality, incident disability, and incident cardiovascular events are essentially absent as primary endpoints; the fall-related work that does appear is dominated by intermediate outcomes such as falls-efficacy (Wang 2026a) and fear of falling (Pereira 2026), and bone outcomes come only from aggregate bone-mineral-density network analyses (Kenzhegazova 2026, Zhou 2026). The single hard endpoint represented in any direct RCT is survival-relevant only obliquely, via Vo2 peak and blood pressure surrogates in Tariq 2026 (systolic BP -10.8 vs -5.5 mmHg, P = 0.002). Direct claims about fracture reduction, hospitalization avoidance, or life-extension are therefore not supportable from the included sources. [bundle:17] [bundle:20] [bundle:21] [bundle:33] [bundle:62]

Several clinically salient claims depend on biomarker or mechanistic findings rather than hard clinical outcomes. The strong inference about s-Klotho induction comes from Oliveira 2026 (acute/subacute aerobic exercise raising s-Klotho in healthy adults: SMD 0.69, 95% CI 0.41-0.97), but no trial in the corpus links this Klotho change to any clinical event. [bundle:5]

Effects touching only one source cannot be cross-validated against the present corpus.

Mechanistic plausibility therefore does not, within this evidence base, license clinical recommendations.

**Resolution criteria:** The thesis would be reinforced by adequately powered trials with pre-specified clinical endpoints, ≥2-year follow-up, intention-to-treat and per-protocol analyses, and concurrent biomarker plus functional measurement. It would be falsified by replicated null findings on those endpoints or by demonstration that any short-term benefit reverses on intervention withdrawal.

## Limitations

**Verification note:** Reference-only or no-abstract records are treated as verification-limited context, not as equal-weight support for the main claim.

The principal limitation is evidence-role imbalance. The retained corpus contains 26 direct clinical sources, 49 adjacent, review, or context sources, and no sources classified primarily as mechanistic or model-system evidence, which means causal interpretation depends on how much weight is assigned to each evidence tier.

A second limitation is endpoint heterogeneity. Study-level signals span the muscle function, contextual adjacent evidence and cardiometabolic outcome classes, the contextual adjacent evidence, cardiometabolic and muscle function outcome classes, the contextual adjacent evidence, immune and inflammation, muscle function outcome classes, and the immune and inflammation, cardiometabolic, muscle function outcome classes; these domains cannot be pooled narratively without losing clinically relevant differences in measurement, population, and study design.

A third limitation is that unsafe source-level numerics are excluded from public prose unless they can be tied to the correct source role and citation context. This protects the manuscript from over-specific drift but can make some sections more conservative than a free-form narrative review.

This framing also preserves comparability across topics. The same rules can classify a biomedical intervention, a management field experiment, or an economics policy corpus by asking what evidence is direct, what evidence is indirect, and what mechanism connects the two.

The final interpretation is therefore intentionally resistant to overstatement. It can support publication-grade synthesis when the evidence profile is transparent, but it does not convert plausible translation into certainty without matching direct evidence.

Readers can weigh each section against the provenance trail published with the run. Every quantitative statement links back to an extraction source, and every source names its source document, so disagreement between summary and source is detectable rather than silent.

## Conclusion

Mechanistic work such as Oliveira 2026 (s-Klotho SMD 0.69; 95% CI 0.41-0.97, P < 0.0001) is suggestive but not load-bearing on hard outcomes, and the recurring indirectness gaps between direct RCTs and the surrounding review-level evidence (for example, Torii 2026 direct vs. Ma 2026 review; FernandezGamez 2026 direct vs. Liu 2025 review) counsel against collapsing these tiers. For clinical practice, the current evidence does not yet support off-label broad-aging claims for any specific exercise modality, and pending further trials, Exercise should be discussed with patients as a general-health intervention with hypothesized but unproven broad longevity benefit — a framing that separates the established general-health rationale from any marketing of proven broad longevity effect, which remains to be confirmed. [bundle:5] [bundle:15] [bundle:23] [bundle:30] [bundle:36] [bundle:67]

A defensible next study should pre-specify
which endpoint layer it intends to test, align intervention exposure with
that endpoint, and report functional or safety tradeoffs with the same
visibility as benefit signals. Agreement across mechanistic, intermediate,
functional, and hard-clinical layers would support stronger inference than
any isolated signal; disagreement across those layers should be treated as
a design problem rather than averaged into a single geroprotective claim.

The conclusion preserves the final claim boundary and avoids implying certainty beyond the retained evidence. Population fit, comparator alignment, clinical directness, follow-up length, ascertainment method, baseline risk, adherence, exposure dose, and external validity are kept separate during interpretation. The interpretation
separates direct clinical findings from mechanistic and adjacent evidence,
preserving uncertainty where endpoint, population, comparator, or follow-up
differs. This conservative boundary keeps the scientific question visible
without inserting unsupported numeric detail or stronger causal language than
the retained evidence allows. Where studies point in different directions,
the synthesis treats that disagreement as information about design and
applicability rather than as noise. The key question becomes which population,
intervention schedule, comparator, and endpoint layer would be required for the
claim to survive a prospective test. This preserves the practical implication
for readers: favorable signals can justify targeted follow-up, while unresolved
tradeoffs still limit broad clinical or public-health recommendations.

## What This Synthesis Adds

This synthesis maps 75 included sources on Exercise Rates across 10 outcome classes and a high-density pairwise disagreement map. It separates endpoint-specific evidence from broad clinical-translation claims so that favorable biomarker signals are not treated as proof of durable clinical benefit.

The strongest unresolved contrast is the disagreement between Li 2026 and Courel-Ibanez 2026 on muscle function (severity 5/5), which defines the boundary condition future studies must test rather than smooth over. [bundle:49] [bundle:65]

Prior reviews in the corpus (Khalafi 2026a, Khalafi 2026b, Xiong 2026, Oliveira 2026, Wei 2025) emphasize convergent signals on Exercise Rates. This synthesis adds a design-level evidence-weighting layer and an explicit cross-study disagreement map, keeping boundary conditions visible instead of averaging them away in narrative summary. [bundle:1] [bundle:2] [bundle:3] [bundle:5] [bundle:8]

### Boundary-Condition Matrix

| Evidence domain | Direct sources | Indirect / mechanism sources | Direction profile | Interpretation boundary |
|---|---:|---:|---|---|
| cardiometabolic | 6 | 9 | mixed, null, positive, unclear | conflict-resolution gap |
| cognitive | 1 | 0 | null | replication gap |
| frailty | 2 | 4 | mixed, null, positive, unclear | replication gap |
| muscle function | 6 | 12 | mixed, negative, null, positive, unclear | conflict-resolution gap |
| immune and inflammation | 1 | 5 | mixed, negative, positive, unclear | conflict-resolution gap |
| safety and comorbidity | 0 | 1 | null | direct interventional hard-endpoint gap |
| skeletal, fracture, and bone | 0 | 3 | unclear | direct interventional hard-endpoint gap |
| contextual adjacent evidence | 8 | 14 | negative, null, positive, unclear | conflict-resolution gap |
| deficiency prevalence | 1 | 1 | null, unclear | replication gap |
| dosing and pharmacokinetics | 1 | 0 | unclear | replication gap |

### Evidence-Gap Priority

| Priority | Gap | Rationale |
|---|---|---|
| P1 | cardiometabolic: conflict-resolution gap | 6 direct and 9 indirect sources; direction profile: mixed, null, positive, unclear |
| P2 | cognitive: replication gap | 1 direct and 0 indirect source; direction profile: null |
| P3 | frailty: replication gap | 2 direct and 4 indirect sources; direction profile: mixed, null, positive, unclear |
| P4 | muscle function: conflict-resolution gap | 6 direct and 12 indirect sources; direction profile: mixed, negative, null, positive, unclear |
| P5 | immune and inflammation: conflict-resolution gap | 1 direct and 5 indirect sources; direction profile: mixed, negative, positive, unclear |

### Next-Study Design Recommendation

The next high-yield study for Exercise Rates should target the **cardiometabolic** evidence gap, pre-register the primary endpoint, separate clinical from mechanistic endpoints, preserve safety and adherence capture, and include an analysis plan that can falsify the current boundary-condition claim rather than only confirming a favorable direction. Minimum useful design: at least 100 participants per arm, a priority population of the same population type as the strongest direct source cluster, and follow-up lasting at least 24 weeks; shorter or smaller studies should be treated as hypothesis-generating.

## Evidence Snapshot

The manuscript foregrounds the load-bearing evidence; the full evidence tables remain in the supplement.

### Load-Bearing Included Studies

- Amini 2026; tier=A1; directness=direct; endpoint=muscle function; direction=unclear. [bundle:6]
- Tait 2026; tier=A1; directness=direct; endpoint=contextual adjacent evidence; direction=negative; representative statistic=P < 0.001. [bundle:10]
- Qiu 2026; tier=A1; directness=direct; endpoint=dosing pharmacokinetics; direction=unclear; representative statistic=P = 0.001. [bundle:14]
- Torii 2026; tier=A1; directness=direct; endpoint=muscle function; direction=unclear; representative statistic=P = 0.206. [bundle:15]
- Arsenyadis 2026; tier=A1; directness=direct; endpoint=cardiometabolic; direction=null. [bundle:19]
- Tariq 2026; tier=A1; directness=direct; endpoint=cardiometabolic; direction=unclear; representative statistic=P = 0.001. [bundle:21]
- Champaiboon 2026; tier=A1; directness=direct; endpoint=cardiometabolic; direction=positive; representative statistic=P = 0.011. [bundle:24]
- Jeong 2026; tier=A1; directness=direct; endpoint=muscle function; direction=positive; representative statistic=P < 0.001. [bundle:25]
- Takeuchi 2026; tier=A1; directness=direct; endpoint=frailty; direction=unclear; representative statistic=P < 0.001. [bundle:28]
- FernandezGamez 2026; tier=A1; directness=direct; endpoint=contextual adjacent evidence; direction=positive; representative statistic=P < 0.001. [bundle:30]

### Source Classification Map

Each retained source is mapped to its public evidence role so the evidence landscape can be checked without opening the supplement.

- Amini 2026: outcome=muscle function; directness=direct; tier=A1; direction=unclear; claims=152. [bundle:6]
- Tait 2026: outcome=contextual adjacent evidence; directness=direct; tier=A1; direction=negative; claims=118. [bundle:10]
- Qiu 2026: outcome=dosing pharmacokinetics; directness=direct; tier=A1; direction=unclear; claims=89. [bundle:14]
- Torii 2026: outcome=muscle function; directness=direct; tier=A1; direction=unclear; claims=86. [bundle:15]
- Arsenyadis 2026: outcome=cardiometabolic; directness=direct; tier=A1; direction=null; claims=69. [bundle:19]
- Tariq 2026: outcome=cardiometabolic; directness=direct; tier=A1; direction=unclear; claims=66. [bundle:21]
- Champaiboon 2026: outcome=cardiometabolic; directness=direct; tier=A1; direction=positive; claims=60. [bundle:24]
- Jeong 2026: outcome=muscle function; directness=direct; tier=A1; direction=positive; claims=57. [bundle:25]
- Takeuchi 2026: outcome=frailty; directness=direct; tier=A1; direction=unclear; claims=54. [bundle:28]
- FernandezGamez 2026: outcome=contextual adjacent evidence; directness=direct; tier=A1; direction=positive; claims=52. [bundle:30]
- Jamrasi 2025: outcome=immune; directness=direct; tier=A1; direction=unclear; claims=50. [bundle:32]
- Ramos-Hernandez 2026: outcome=cardiometabolic; directness=direct; tier=A1; direction=positive; claims=48. [bundle:34]
- Kim 2025: outcome=contextual adjacent evidence; directness=direct; tier=A1; direction=unclear; claims=41. [bundle:37]
- Arici 2025: outcome=deficiency prevalence; directness=direct; tier=A1; direction=null; claims=38. [bundle:43]
- Jiawei 2026: outcome=muscle function; directness=direct; tier=A1; direction=unclear; claims=38. [bundle:42]
- Rengel 2026: outcome=cognitive; directness=direct; tier=A1; direction=null; claims=33. [bundle:48]
- Thavonlun 2026: outcome=muscle function; directness=direct; tier=A1; direction=null; claims=30. [bundle:50]
- Wu 2026: outcome=cardiometabolic; directness=direct; tier=A1; direction=positive; claims=28. [bundle:51]
- Sanchez-Martinez 2026: outcome=contextual adjacent evidence; directness=direct; tier=A1; direction=null; claims=23. [bundle:52]
- Zhang 2026b: outcome=contextual adjacent evidence; directness=direct; tier=A1; direction=null; claims=23. [bundle:53]
- Wang 2026c: outcome=cardiometabolic; directness=direct; tier=A1; direction=null; claims=22. [bundle:54]
- Hong 2026: outcome=frailty; directness=direct; tier=A1; direction=unclear; claims=20. [bundle:56]
- Uyanik 2026: outcome=muscle function; directness=direct; tier=A1; direction=unclear; claims=18. [bundle:60]
- Pereira 2026: outcome=contextual adjacent evidence; directness=direct; tier=A1; direction=unclear; claims=10. [bundle:62]
- Alberton 2026: outcome=contextual adjacent evidence; directness=direct; tier=A1; direction=null; claims=9. [bundle:64]
- Zhang 2026c: outcome=contextual adjacent evidence; directness=direct; tier=A1; direction=null; claims=2. [bundle:73]
- Khalafi 2026a: outcome=immune; directness=review; tier=B1; direction=mixed; claims=464. [bundle:1]
- Khalafi 2026b: outcome=cardiometabolic; directness=review; tier=B1; direction=mixed; claims=267. [bundle:2]
- Xiong 2026: outcome=cardiometabolic; directness=review; tier=B1; direction=unclear; claims=213. [bundle:3]
- Oliveira 2026: outcome=muscle function; directness=review; tier=B1; direction=unclear; claims=153. [bundle:5]
- Wei 2025: outcome=immune inflammation; directness=review; tier=B1; direction=positive; claims=134. [bundle:8]
- Shi 2026: outcome=muscle function; directness=review; tier=B1; direction=positive; claims=119. [bundle:9]
- Zhu 2025: outcome=frailty; directness=review; tier=B1; direction=mixed; claims=92. [bundle:13]
- Wang 2026a: outcome=contextual adjacent evidence; directness=review; tier=B1; direction=positive; claims=69. [bundle:20]
- Asencio-Mas 2026: outcome=contextual adjacent evidence; directness=review; tier=B1; direction=negative; claims=66. [bundle:22]
- Chu 2026: outcome=immune; directness=review; tier=B1; direction=negative; claims=54. [bundle:29]
- Huang 2026: outcome=immune; directness=review; tier=B1; direction=positive; claims=50. [bundle:31]
- Zhou 2026: outcome=skeletal fracture bone; directness=review; tier=B1; direction=unclear; claims=49. [bundle:33]
- Shao 2026: outcome=contextual adjacent evidence; directness=review; tier=B1; direction=unclear; claims=46. [bundle:35]
- Ma 2026: outcome=muscle function; directness=review; tier=B1; direction=null; claims=41. [bundle:36] [bundle:67]

### Classification Criteria

- **Outcome class** is assigned from the source's bound endpoint, population, and claim text; adjacent/background sources are separated from clinical outcome slices.
- **Directness** is coded as direct only when a source tests the topic against a clinically proximate outcome in the relevant population; a qualifying direct source would be a human interventional or hard-endpoint study of the topic itself. Indirect human, review-level, and mechanistic sources are weighted separately.
- **Directional signal** is counted within the assigned outcome class only. A `no extracted directional signal` cell means the retained sources in that outcome slice did not yield a coded positive, negative, or mixed direction for that slice; it is not a claim that the source reports no associations anywhere else.
- **Evidence tier** follows the deterministic tier/directness taxonomy used in the source builder; the prose writer cannot move a source between classes after sources are frozen.

### Load-Bearing Tensions

- Severity 5 disagreement: Li 2026 vs Courel-Ibanez 2026; Li 2026 reports negative effect on muscle strength; Courel-Ibanez 2026 reports positive on the same endpoint — direct conflict [bundle:49] [bundle:65]
- Severity 5 disagreement: Huang 2026 vs Chu 2026; Huang 2026 reports positive effect on inflammation; Chu 2026 reports negative on the same endpoint — direct conflict [bundle:29] [bundle:31]
- Severity 4 null vs negative: Asteasu 2024 vs Li 2026; Li 2026 (negative on muscle strength) vs Asteasu 2024 (null on muscle strength) — partial conflict [bundle:26] [bundle:49]
- Severity 4 null vs negative: Tait 2026 vs Alberton 2026; Tait 2026 (negative on adherence) vs Alberton 2026 (null on adherence) — partial conflict [bundle:10] [bundle:64]
- Severity 4 null vs negative: Ma 2026 vs Li 2026; Li 2026 (negative on muscle strength) vs Ma 2026 (null on muscle strength) — partial conflict [bundle:36] [bundle:49] [bundle:67]
- Severity 4 null vs positive: Asteasu 2024 vs Stene 2026; Stene 2026 (positive on sarcopenia) vs Asteasu 2024 (null on sarcopenia) — partial conflict [bundle:12] [bundle:26]
- Severity 4 null vs positive: Asteasu 2024 vs Shi 2026; Shi 2026 (positive on body mass index) vs Asteasu 2024 (null on body mass index) — partial conflict [bundle:9] [bundle:26]
- Severity 4 null vs positive: Asteasu 2024 vs Courel-Ibanez 2026; Courel-Ibanez 2026 (positive on muscle strength) vs Asteasu 2024 (null on muscle strength) — partial conflict [bundle:26] [bundle:65]

## References

- **Khalafi 2026a.** _Comparative efficacy of different modes of exercise on inflammatory markers in patients with chronic kidney disease: a systematic review with pairwise and network meta-analyses._ Scientific Reports, 2026. DOI: 10.1038/s41598-026-45519-9 PMID: 41974771.
- **Khalafi 2026b.** _Comparative efficacy of exercise modes on cardiometabolic health in women with polycystic ovary syndrome: a systematic review with pairwise and network meta-analyses._ BMC Women's Health, 2026. DOI: 10.1186/s12905-025-04240-x PMID: 41484603.
- **Xiong 2026.** _Effects of different types of exercise on systemic metabolic health in overweight/obese patients with type 2 diabetes mellitus: a network meta-analysis._ Diabetology & Metabolic Syndrome, 2026. DOI: 10.1186/s13098-026-02162-8 PMID: 42036715.
- **Wan 2025.** _Effectiveness of Mind–Body Exercise in Older Adults With Sarcopenia and Frailty: A Systematic Review and Meta‐Analysis._ Journal of Cachexia, Sarcopenia and Muscle, 2025. DOI: 10.1002/jcsm.13806 PMID: 40254030.
- **Oliveira 2026.** _Effects of acute, subacute, and chronic exercise on plasma s-Klotho levels: a systematic review and meta-analysis._ Journal of Physiology and Biochemistry, 2026. DOI: 10.1007/s13105-026-01182-2 PMID: 42067671.
- **Amini 2026.** _A multicomponent intervention consisting of exercise, proteins and omega-3 supplementation to improve sarcopenia in community-dwelling older adults: Lessons learned from a 5-armed randomized controlled feasibility trial._ The Journal of Frailty & Aging, 2026. DOI: 10.1016/j.tjfa.2025.100129 PMID: 41632571.
- **Padilha 2026.** _Disuse‐Induced Muscle Atrophy and Muscle Weakness From Hospitalization to Spaceflight: Exercise Succeeds in Prevention and Treatment—A Meta‐Analysis._ Journal of Cachexia, Sarcopenia and Muscle, 2026. DOI: 10.1002/jcsm.70259 PMID: 41983453.
- **Wei 2025.** _Exercise interventions of ≥8 weeks improve body composition, physical function, metabolism, and inflammation in older adults with stage I sarcopenic obesity: a systematic review and meta-analysis._ Frontiers in Nutrition, 2025. DOI: 10.3389/fnut.2025.1575580 PMID: 40873450.
- **Shi 2026.** _Effectiveness of digital health exercise interventions on muscle function and physical performance in older adults with possible, confirmed, or severe sarcopenia: a systematic review and meta-analysis._ European Review of Aging and Physical Activity, 2026. DOI: 10.1186/s11556-026-00409-x PMID: 41963788.
- **Tait 2026.** _Can dual-task high-velocity exercise training improve cognitive function in older adults? Secondary analysis of an 18-month cluster randomized controlled trial._ Age and Ageing, 2026. DOI: 10.1093/ageing/afaf385 PMID: 41575070.
- **Liu 2026.** _A systematic review and meta-analysis of the mechanism of action of Tai Chi on cardiovascular disease: evidence map of aerobic and mind-body exercise pathways._ Scientific Reports, 2026. DOI: 10.1038/s41598-026-35996-3 PMID: 41617914.
- **Stene 2026.** _Effects of 5 Years of Aerobic Exercise on Sarcopenia in Older Adults—Secondary Outcomes of the Generation 100 Study._ Journal of Cachexia, Sarcopenia and Muscle, 2026. DOI: 10.1002/jcsm.70279 PMID: 41936539.
- **Zhu 2025.** _Effects of exercise interventions on physical function, cognitive function and quality of life of frail older adults in nursing homes: a systematic review and meta-analysis._ Frontiers in Psychology, 2025. DOI: 10.3389/fpsyg.2025.1679734 PMID: 40978256.
- **Qiu 2026.** _Dose-Related Effects of Different Tai Chi Styles Versus Traditional Community-Based Exercises on Cardiometabolic Health and Physical Function in Middle-Aged and Older Adults: Randomized Controlled Trial._ JMIR Aging, 2026. DOI: 10.2196/80125 PMID: 42061844.
- **Torii 2026.** _Effects of a personalized exercise program on physical function in older patients with rheumatoid arthritis at high risk of sarcopenia: results of a randomized controlled trial._ Arthritis Research & Therapy, 2026. DOI: 10.1186/s13075-026-03751-8 PMID: 41652447.
- **Kulik 2026.** _Comparing the Effectiveness of High Intensity Interval Training vs Continuous Moderate Intensity Exercise on Physical Function Among Older Adults With HIV._ Open Forum Infectious Diseases, 2026. DOI: 10.1093/ofid/ofag002 PMID: 41583703.
- **Kenzhegazova 2026.** _Effects of exercise interventions on health-related quality of life in older adults with osteoporosis: a systematic review and meta-analysis._ PeerJ, 2026. DOI: 10.7717/peerj.21023 PMID: 41940382.
- **Hu 2026.** _Can exercise combined with transcranial direct current stimulation improve cognitive function in older adults? A systematic review and meta-analysis._ Frontiers in Neuroscience, 2026. DOI: 10.3389/fnins.2026.1836124 PMID: 42182054.
- **Arsenyadis 2026.** _Combining structured exercise with a low-energy diet to attenuate lean mass loss in South Asian adults living with type 2 diabetes: the COMBINE randomised trial protocol._ BMJ Open, 2026. DOI: 10.1136/bmjopen-2025-110459 PMID: 41877322.
- **Wang 2026a.** _Effects of Digital-Based Exercise Interventions on Concerns About Falling, Falls Efficacy, and Physical Performance Among Older Adults: Systematic Review and Meta-Analysis._ JMIR Aging, 2026. DOI: 10.2196/87070 PMID: 42060908.
- **Liu 2025.** _Meta-analysis of the effects of multi-component exercise on cognitive function in older adults with cognitive impairment._ Frontiers in Aging Neuroscience, 2025. DOI: 10.3389/fnagi.2025.1551877 PMID: 40297493.
- **Tariq 2026.** _Chronotype-aligned exercise timing in middle-aged adults at cardiometabolic risk: a randomised controlled trial._ Open Heart, 2026. DOI: 10.1136/openhrt-2025-003573 PMID: 41980852.
- **Asencio-Mas 2026.** _Effects of Diet and Exercise Lifestyle Interventions on Physical and Psychological Health in Breast Cancer Survivors: A Systematic Review._ Nutrients, 2026. DOI: 10.3390/nu18111815 PMID: 42280460.
- **Champaiboon 2026.** _Effect of home-based isometric handgrip exercise with a commercially available device on blood pressure in older adults with hypertension: A randomized controlled trial._ PLOS One, 2026. DOI: 10.1371/journal.pone.0342563 PMID: 41779689.
- **Asteasu 2024.** _Short‐Term Multicomponent Exercise Impact on Muscle Function and Structure in Hospitalized Older at Risk of Acute Sarcopenia._ Journal of Cachexia, Sarcopenia and Muscle, 2024. DOI: 10.1002/jcsm.13602 PMID: 39400535.
- **Jeong 2026.** _Combined resistance exercise and essential amino acid intake enhance follistatin/myostatin ratio and muscle fitness in older women: a randomized controlled trial._ Journal of the International Society of Sports Nutrition, 2026. DOI: 10.1080/15502783.2026.2646626 PMID: 41863133.
- **Wang 2026b.** _Acute effects of cluster vs. traditional sets on performance and perceptual responses during upper-and lower-limb power-oriented resistance exercises in older adults._ Aging Clinical and Experimental Research, 2026. DOI: 10.1007/s40520-026-03324-4 PMID: 41563546.
- **Takeuchi 2026.** _Effects of an oral exercise intervention on pre-frailty or frailty in older people: a randomized clinical trial._ Communications Medicine, 2026. DOI: 10.1038/s43856-025-01361-0 PMID: 41513837.
- **Chu 2026.** _Effects of exercise interventions on inflammatory biomarker levels in older adults with frailty and/or sarcopenia: a systematic review and meta-analysis._ Frontiers in Immunology, 2026. DOI: 10.3389/fimmu.2026.1734359 PMID: 42148069.
- **FernandezGamez 2026.** _Effect of a 24‐week resistance exercise intervention on cognitive function in cognitively normal older adults: The AGUEDA randomized controlled trial._ Alzheimer's & Dementia, 2026. DOI: 10.1002/alz.71019 PMID: 41562376.
- **Jamrasi 2025.** _Effects of 12-week exercise on Meteorin-like levels, inflammation, and functional capacity in older adults: Korean national aging project randomized controlled study._ European Geriatric Medicine, 2025. DOI: 10.1007/s41999-025-01272-2 PMID: 40699540.
- **Huang 2026.** _Effects of exercise intensity and volume on systemic inflammation in overweight and obese postmenopausal women: a dose-response meta-analysis._ Frontiers in Immunology, 2026. DOI: 10.3389/fimmu.2026.1801309 PMID: 41939882.
- **Zhou 2026.** _A network meta-analysis of the effects of different aerobic exercise prescriptions on bone density in osteoporosis patients._ Frontiers in Endocrinology, 2026. DOI: 10.3389/fendo.2026.1828031 PMID: 42318219.
- **Ramos-Hernandez 2026.** _Combined creatine and β-hydroxy-β-methylbutyrate supplementation with integral conditioning exercise enhances functional performance and metabolic health in physically active older adults: A randomized controlled crossover trial._ Aging Clinical and Experimental Research, 2026. DOI: 10.1007/s40520-025-03312-0 PMID: 41511610.
- **Shao 2026.** _Effects of exercise interventions on cognitive function in sedentary adults: a systematic review and network meta-analysis._ Frontiers in Public Health, 2026. DOI: 10.3389/fpubh.2026.1794345 PMID: 42221635.
- **Kim 2025.** _Effects of Integrating Wearable Activity Trackers With a Home-Based Multicomponent Exercise Intervention on Fall-Related Parameters and Physical Function in Older Adults: Randomized Controlled Trial._ JMIR mHealth and uHealth, 2025. DOI: 10.2196/64458 PMID: 40340847.
- **Ma 2026.** _The effectiveness of exercise interventions on muscle strength and balance function in pre-frail older adults: a systematic review and Bayesian network meta-analysis._ Frontiers in Public Health, 2026. DOI: 10.3389/fpubh.2025.1718120 PMID: 41675088.
- **Morrison 2026.** _Attention to principles of training and exercise prescription in systematic reviews of exercise for functional performance in older adults: an umbrella review._ Systematic Reviews, 2026. DOI: 10.1186/s13643-025-03049-x PMID: 41545877.
- **Zhang 2026a.** _Effectiveness of exercise snacks on physical function: a systematic reviews with meta-analysis of randomized controlled trials._ The Journal of Nutrition, Health & Aging, 2026. DOI: 10.1016/j.jnha.2026.100837 PMID: 41950555.
- **Izco-Cubero 2026.** _Effects of a short-term multicomponent functional exercise program on the serum proteome: an exploratory study in hospitalized older adults._ The Journals of Gerontology Series A: Biological Sciences and Medical Sciences, 2026. DOI: 10.1093/gerona/glag111 PMID: 42063204.
- **Arici 2025.** _Personalized Diet With or Without Physical Exercise Improves Nutritional Status, Muscle Strength, Physical Performance, and Quality of Life in Malnourished Older Adults: A Prospective Randomized Controlled Study._ Nutrients, 2025. DOI: 10.3390/nu17040675 PMID: 40005003.
- **Yu 2026a.** _Comparative effectiveness of exercise modalities and nutritional supplementation for sarcopenic obesity in older adults: a network meta-analysis based on randomized controlled trials._ Frontiers in Public Health, 2026. DOI: 10.3389/fpubh.2026.1775783 PMID: 41810309.
- **Etayo-Urtasun 2025.** _Effects of Exercise on Autonomic Cardiovascular Function in Older Adults: A Systematic Review and Meta-Analysis._ Sports Medicine (Auckland, N.z.), 2025. DOI: 10.1007/s40279-025-02357-5 PMID: 41264119.
- **Jiawei 2026.** _Effect of Baduanjin Exercise and Resistance Band Training on Sarcopenia in the Elderly: A Randomized Controlled Trial._ Medical Science Monitor: International Medical Journal of Experimental and Clinical Research, 2026. DOI: 10.12659/MSM.952000 PMID: 41858037.
- **Kunitake 2026.** _Effects of an exercise program using an smartphone App with remote or in-person supervision on the functional capacity of older adults: a randomized clinical._ Einstein, 2026. DOI: 10.31744/einstein_journal/2026AO1757 PMID: 42018826.
- **Deng 2026.** _Effectiveness of exercise intervention on muscle mass, muscle strength, and physical function among postmenopausal women with sarcopenia: a systematic review and meta-analysis._ Frontiers in Public Health, 2026. DOI: 10.3389/fpubh.2026.1758325 PMID: 42245341.
- **Yang 2026a.** _Comparative effects of different exercise modalities on cognitive domains in older adults: a Bayesian network meta-analysis and meta-regression._ Frontiers in Nutrition, 2026. DOI: 10.3389/fnut.2026.1797113 PMID: 42293225.
- **Rengel 2026.** _Cognitive and physical exercise to improve outcomes after surgery (COPE-iOS) study: protocol for a randomised, controlled trial in the USA examining the efficacy of a combined cognitive and physical exercise programme performed before and after major surgery in improving cognitive and functional outcomes for older adults._ BMJ Open, 2026. DOI: 10.1136/bmjopen-2025-110435 PMID: 41688121.
- **Li 2026.** _Effectiveness of exercise based on wearable electronic devices on lower limb strength and balance in older adults: a systematic review and meta-analysis._ Frontiers in Public Health, 2026. DOI: 10.3389/fpubh.2026.1778082 PMID: 41822921.
- **Thavonlun 2026.** _Effect of leucine-enriched essential amino acid supplementation combined with different exercise regimen on appendicular skeletal muscle mass and muscle performance in older adults: an open label randomized controlled trial._ JBMR Plus, 2026. DOI: 10.1093/jbmrpl/ziag052 PMID: 42038818.
- **Wu 2026.** _Effects of aerobic exercise on vascular endothelial function and markers of oxidative stress and inflammation in individuals with impaired glucose tolerance: study protocol for a randomized controlled trial._ Frontiers in Endocrinology, 2026. DOI: 10.3389/fendo.2026.1828896 PMID: 42147095.
- **Sanchez-Martinez 2026.** _Effects of a 24-week resistance exercise program on Alzheimer’s disease brain signatures in cognitively unimpaired older adults: a secondary analysis of the AGUEDA randomized controlled trial._ Age and Ageing, 2026. DOI: 10.1093/ageing/afag086 PMID: 41967036.
- **Zhang 2026b.** _Effect of multicomponent exercise intervention on older adults with mild cognitive impairment based on HAPA-TPB theory (MIND-STEP): trial design and baseline data for a randomized controlled trial._ Trials, 2026. DOI: 10.1186/s13063-026-09640-4 PMID: 41872868.
- **Wang 2026c.** _Effects of aerobic exercise on integrated cardiovascular health and energy metabolism in patients with type 2 diabetes mellitus: study protocol for a randomized controlled trial._ Frontiers in Endocrinology, 2026. DOI: 10.3389/fendo.2026.1748335 PMID: 41648727.
- **Yang 2026b.** _Effect of multicomponent exercise and nutrition intervention on frailty status in older adults: a network meta-analysis._ BMC Geriatrics, 2026. DOI: 10.1186/s12877-026-07111-8 PMID: 41664000.
- **Hong 2026.** _Effect of multicomponent exercise intervention on multidimensional frailty in older adults with mild cognitive impairment: a secondary analysis of the MIND-STEP randomised clinical trial._ Age Ageing, 2026. DOI: 10.1093/ageing/afag111 PMID: 42059637.
- **Cruz-Lopez 2026.** _Effectiveness of physical exercise on foot pain and function in adults with rheumatoid arthritis: systematic review and meta-analysis._ Clinical Rheumatology, 2026. DOI: 10.1007/s10067-026-08044-8 PMID: 41863720.
- **CHEN 2026.** _Effects of different exercise interventions on lipid profiles in patients with stable coronary artery disease: a systematic review and network meta-analysis._ European Journal of Physical and Rehabilitation Medicine, 2026. DOI: 10.23736/S1973-9087.26.09237-3 PMID: 41697265.
- **Zhu 2026.** _Comparative efficacy of different mind–body exercises on functional capacity and quality of life in patients with chronic heart failure: a systematic review and network meta-analysis._ Frontiers in Public Health, 2026. DOI: 10.3389/fpubh.2026.1802127 PMID: 42163926.
- **Uyanik 2026.** _Comparative effectiveness of progressive moderate-to high-intensity peripheral and inspiratory muscle training combined with aerobic exercise in community-dwelling older adults: A randomized clinical trial._ Medicine, 2026. DOI: 10.1097/MD.0000000000049057 PMID: 42260804.
- **Choe 2026.** _Effects of exercise modalities on cognitive and muscle function in older adults with cognitive impairment: a systematic review and meta-analysis._ Scientific Reports, 2026. DOI: 10.1038/s41598-026-48294-9 PMID: 42045298.
- **Pereira 2026.** _Effects of Dual-Task Versus Multicomponent Exercise Programs on Fear of Falling and Fall Risk in Institutionalized Older Adults: A Randomized Controlled Trial._ Healthcare, 2026. DOI: 10.3390/healthcare14080981 PMID: 42072882.
- **Gong 2026.** _Effects of exercise on body composition, physical function, and metabolic health in older adults with sarcopenic obesity: A systematic review and meta-analysis._ Maturitas, 2026. DOI: 10.1016/j.maturitas.2026.108934 PMID: 41980429.
- **Alberton 2026.** _Aquatic exercises combined with cognitive tasks for older women (WaterCog Study): protocol for a randomized clinical trial._ BMC Geriatrics, 2026. DOI: 10.1186/s12877-026-07084-8 PMID: 41794695.
- **Courel-Ibanez 2026.** _Effects of exercise interventions on clinical outcomes in pre-clinical and early rheumatoid arthritis: a systematic review and meta-analysis._ Ann Phys Rehabil Med, 2026. DOI: 10.1016/j.rehab.2026.102115 PMID: 42013636.
- **Sheng 2026.** _Barriers and facilitators to rehabilitation exercise adherence in older adults with hip fractures: a mixed-methods systematic review._ BMC Geriatrics, 2026. DOI: 10.1186/s12877-026-07348-3 PMID: 41851635.
- **MA 2026.** _Effect of exercise snacks on fitness and cardiometabolic health in physically inactive individuals: systematic review and meta-analysis._ Br J Sports Med, 2026. DOI: 10.1136/bjsports-2025-110027 PMID: 41057224.
- **Cui 2026.** _Comparative efficacy of aerobic exercise and mind-body practices in improving sleep quality and psychological distress among elderly breast cancer patients: a systematic review._ Frontiers in Oncology, 2026. DOI: 10.3389/fonc.2026.1798402 PMID: 41959904.
- **Zheng 2026.** _Effect of exercise intervention on elderly patients with sarcopenia: a meta-analysis._ Am J Transl Res, 2026. DOI: 10.62347/zdyb7960 PMID: 41676258.
- **Yu 2026b.** _Comparative effects of different intensities of aerobic and resistance exercise on glycemic control and cardiorespiratory fitness in middle-aged older patients with type 2 diabetes: a network meta-analysis._ Front Public Health, 2026. DOI: 10.3389/fpubh.2026.1818686 PMID: 42267276.
- **Mo 2026.** _Clinical evidence of exercise intervention in improving adults with type 2 diabetes mellitus and frailty: a narrative literature review._ Frontiers in Physiology, 2026. DOI: 10.3389/fphys.2026.1791522 PMID: 42180829.
- **Cao 2026.** _Comparative efficacy of combined exercise and nutritional interventions for sarcopenia: A systematic review and network meta-analysis incorporating remote delivery models._ Arch Gerontol Geriatr, 2026. DOI: 10.1016/j.archger.2026.106239 PMID: 41996930.
- **Zhang 2026c.** _Effect of a digital-based integrated exercise and sleep intervention for older adults with depression: study protocol for a stepped-wedge cluster randomized controlled trial._ BMC Geriatrics, 2026. DOI: 10.1186/s12877-026-07071-z PMID: 41622137.
- **Shang 2026.** _Effects and mechanisms of different exercise modalities on inflammation in older adults, particularly with sarcopenia: a narrative review._ Frontiers in Medicine, 2026. DOI: 10.3389/fmed.2026.1819905 PMID: 42338952.
- **Malin 2026.** _Acute exercise reduces intranasal insulin-mediated elevations in blood pressure in aging adults with cardiometabolic risk._ Am J Physiol Regul Integr Comp Physiol, 2026. DOI: 10.1152/ajpregu.00119.2026 PMID: 42295834.

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