Derivation Web

source_549565c1998e4d75

by researka:v2 · 2026-06-28 09:04:36.966283+04:00

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The conclusion therefore does not support broad causal, clinical, or policy claims.", "type": "claim"}, {"id": "claim_2", "text": "This paper synthesizes evidence on exercise cognition effects across 41 included source papers and 1801 high-confidence extracted claims.", "type": "claim"}, {"id": "claim_3", "text": "The evidence profile contains 5 direct clinical sources, 36 adjacent clinical sources, and no sources classified primarily as mechanistic or model-system evidence, with a high-density pairwise disagreement map across the evidence base.", "type": "claim"}, {"id": "claim_4", "text": "Positive study-level signals are summarized in the dosing and pharmacokinetics outcome class; null signals are summarized in the cognitive and safety and comorbidity outcome classes; negative signals are not the dominant direction in any outcome class; mixed or heterogeneous signals are summarized in the contextual adjacent evidence, muscle function, cardiometabolic, deficiency prevalence, frailty, and immune and inflammation outcome classes. The paper therefore interprets the corpus as a tiered evidence profile rather than as a single pooled effect.", "type": "claim"}, {"id": "claim_5", "text": "The conclusion is that exercise cognition effects should be treated as a bounded geroscience hypothesis: the retained clinical and adjacent evidence profile defines the scope for targeted testing, while mixed and null findings limit any unqualified anti-aging claim.", "type": "claim"}, {"id": "claim_6", "text": "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.", "type": "claim"}, {"id": "claim_7", "text": "This synthesis evaluates evidence on exercise cognition effects across 41 included source papers and 1801 high-confidence extracted claims. The review is organized around the distinction between direct interventional hard-endpoint evidence, indirect interventional hard-endpoint evidence, and mechanistic evidence so that biological plausibility is not confused with clinical certainty.", "type": "claim"}, {"id": "claim_8", "text": "The corpus contains 5 direct clinical sources, 36 adjacent clinical 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.", "type": "claim"}, {"id": "claim_9", "text": "The thesis is: Across 41 curated reference papers, the evidence base for exercise cognition effects shows a context-dependent profile. Positive signals appear in: contextual other, muscle function. Negative signals appear in: cardiometabolic. Null findings dominate: contextual other, cognitive. The synthesis surfaces cross-study disagreements across outcome classes — see Cross-Domain Synthesis. The exercise cognition effects anti-aging 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 thesis is treated as an organizing claim, not as a substitute for the study table, because the source record includes supportive, null, and adverse signals across different outcome classes.", "type": "claim"}, {"id": "claim_10", "text": "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.", "type": "claim"}, {"id": "claim_11", "text": "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.", "type": "claim"}, {"id": "claim_12", "text": "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.", "type": "claim"}, {"id": "claim_13", "text": "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.", "type": "claim"}, {"id": "claim_14", "text": "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.", "type": "claim"}, {"id": "claim_15", "text": "The background evidence for exercise cognition effects is heterogeneous rather than uniformly confirmatory. Direct clinical sources such as Tan 2023, Khan 2026, Leischik 2021 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.", "type": "claim"}, {"id": "claim_16", "text": "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.", "type": "claim"}, {"id": "claim_17", "text": "Across the retained sources, positive signals cluster around the contextual adjacent evidence, muscle function and cognitive outcome classes; null signals around the contextual adjacent evidence, cognitive and cardiometabolic outcome classes; and negative or adverse signals around the cardiometabolic outcome class. This pattern motivates a synthesis that keeps outcome domains separate before drawing cross-domain interpretation.", "type": "claim"}, {"id": "claim_18", "text": "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.", "type": "claim"}, {"id": "claim_19", "text": "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.", "type": "claim"}, {"id": "claim_20", "text": "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.", "type": "claim"}, {"id": "claim_21", "text": "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.", "type": "claim"}, {"id": "claim_22", "text": "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); within-class agreement, disagreement, and directness gaps surfaced explicitly. Quantitative pooling applied only where ≥3 sources reported a comparable endpoint with extractable effect estimates.", "type": "claim"}, {"id": "claim_23", "text": "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.", "type": "claim"}, {"id": "claim_24", "text": "| Evidence domain | Corpus slice | Strongest signal | Directness | Main limitation |", "type": "claim"}, {"id": "claim_25", "text": "| Exercise Cognition Effects / Contextual Adjacent Evidence | n=24; claims=1044 | significant source statistic in 18/24 sources; receipt-level direction coded unclear | 3 direct; 13 indirect; 1 protocol; 7 review | limited corpus depth in this outcome class |", "type": "claim"}, {"id": "claim_26", "text": "| Exercise Cognition Effects / Cognitive | n=6; claims=126 | significant source statistic in 2/6 sources; receipt-level direction coded null | 1 direct; 2 indirect; 3 review | limited corpus depth in this outcome class |", "type": "claim"}, {"id": "claim_27", "text": "| Exercise Cognition Effects / Cardiometabolic | n=2; claims=76 | significant source statistic in 2/2 sources; receipt-level direction coded null | 2 indirect | limited corpus depth in this outcome class |", "type": "claim"}, {"id": "claim_28", "text": "Skeletal and muscle context: 3 sources; significant source statistic in 1/3 sources; receipt-level direction coded null.", "type": "claim"}, {"id": "claim_29", "text": "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.", "type": "claim"}, {"id": "claim_30", "text": "Contextual Adjacent Evidence: n=24; claims=1044; mixed signal in 12/24 sources | directness: 3 direct; 13 indirect; 7 review; 1 protocol; main limitation: directionally heterogeneous.", "type": "claim"}, {"comparator": "not extracted", "directness": "review-level", "doi": "10.1186/s11556-021-00256-y", "effect": "not extracted", "endpoint": "not extracted", "id": "source_1", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Effects of multimodal agility-like exercise training compared to inactive controls and alternative training on physical performance in older adults: a systematic review and meta-analysis", "type": "source", "url": "https://doi.org/10.1186/s11556-021-00256-y", "year": 2021}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1007/s00421-023-05154-y", "effect": "not extracted", "endpoint": "not extracted", "id": "source_2", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "The benefits of regular aerobic exercise training on cerebrovascular function and cognition in older adults", "type": "source", "url": "https://doi.org/10.1007/s00421-023-05154-y", "year": 2023}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3389/fnagi.2021.742587", "effect": "not extracted", "endpoint": "not extracted", "id": "source_3", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "5 Years of Exercise Intervention Did Not Benefit Cognition Compared to the Physical Activity Guidelines in Older Adults, but Higher Cardiorespiratory Fitness Did. A Generation 100 Substudy", "type": "source", "url": "https://doi.org/10.3389/fnagi.2021.742587", "year": 2021}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1186/s40798-025-00956-0", "effect": "not extracted", "endpoint": "not extracted", "id": "source_4", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Effects of 5-Year Exercise Training on Cognition in Older Adults: 10-Years Follow-Up from the Generation 100 Study", "type": "source", "url": "https://doi.org/10.1186/s40798-025-00956-0", "year": 2025}, {"comparator": "not extracted", "directness": "review-level", "doi": "10.1093/ageing/afag168", "effect": "not extracted", "endpoint": "not extracted", "id": "source_5", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Efficacy of traditional Chinese exercises on cognitive function in older adults: a systematic review and meta-analysis of randomised controlled trials", "type": "source", "url": "https://doi.org/10.1093/ageing/afag168", "year": 2026}, {"comparator": "not extracted", "directness": "review-level", "doi": "10.3389/fpsyt.2025.1741998", "effect": "not extracted", "endpoint": "not extracted", "id": "source_6", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Effects of aerobic exercise on cognitive function in older adults with mild cognitive impairment: a systematic review and meta-analysis", "type": "source", "url": "https://doi.org/10.3389/fpsyt.2025.1741998", "year": 2026}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1007/s12603-023-1928-7", "effect": "not extracted", "endpoint": "not extracted", "id": "source_7", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Impact of Exercise and Cognitive Stimulation Therapy on Physical Function, Cognition and Muscle Mass in Pre-Frail Older Adults in the Primary Care Setting: A Cluster Randomized Controlled Trial", "type": "source", "url": "https://doi.org/10.1007/s12603-023-1928-7", "year": 2023}, {"comparator": "not extracted", "directness": "review-level", "doi": "10.3389/fpubh.2025.1725847", "effect": "not extracted", "endpoint": "not extracted", "id": "source_8", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Effects of digitalized traditional Chinese exercises on the physical and mental health and quality of life of older adults: a systematic review and meta-analysis of randomized controlled trials", "type": "source", "url": "https://doi.org/10.3389/fpubh.2025.1725847", "year": 2025}, {"comparator": "not extracted", "directness": "review-level", "doi": "10.1186/s11556-023-00325-4", "effect": "not extracted", "endpoint": "not extracted", "id": "source_9", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Mind body exercise improves cognitive function more than aerobic- and resistance exercise in healthy adults aged 55 years and older – an umbrella review", "type": "source", "url": "https://doi.org/10.1186/s11556-023-00325-4", "year": 2023}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3389/fnagi.2026.1776069", "effect": "not extracted", "endpoint": "not extracted", "id": "source_10", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Effects of aerobic exercise and computer-based cognitive training on cognition, functional independence, quality of life, and salivary cortisol levels in older adults with mild cognitive impairment: a randomized trial", "type": "source", "url": "https://doi.org/10.3389/fnagi.2026.1776069", "year": 2026}, {"comparator": "not extracted", "directness": "review-level", "doi": "10.1371/journal.pone.0232958", "effect": "not extracted", "endpoint": "not extracted", "id": "source_11", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Effects of exercise, cognitive, and dual-task interventions on cognition in type 2 diabetes mellitus: A systematic review and meta-analysis", "type": "source", "url": "https://doi.org/10.1371/journal.pone.0232958", "year": 2020}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1371/journal.pone.0346490", "effect": "not extracted", "endpoint": "not extracted", "id": "source_12", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Wuqinxi exercise for mind and balance: Enhancing cognition, fall prevention, and quality of life in older adults with mild cognitive impairment", "type": "source", "url": "https://doi.org/10.1371/journal.pone.0346490", "year": 2026}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3389/fpubh.2022.1009775", "effect": "not extracted", "endpoint": "not extracted", "id": "source_13", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Longitudinal effects of exercise according to the World Health Organization guidelines on cognitive function in middle-aged and older adults", "type": "source", "url": "https://doi.org/10.3389/fpubh.2022.1009775", "year": 2022}, {"comparator": "not extracted", "directness": "review-level", "doi": "10.3389/fpsyg.2026.1824910", "effect": "not extracted", "endpoint": "not extracted", "id": "source_14", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Traditional Chinese exercise for quality of life, cognition, sleep in Parkinson’s disease: a systematic review and meta-analysis", "type": "source", "url": "https://doi.org/10.3389/fpsyg.2026.1824910", "year": 2026}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3389/fnagi.2022.892343", "effect": "not extracted", "endpoint": "not extracted", "id": "source_15", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "The Effects of Aerobic Exercise Training on Cerebrovascular and Cognitive Function in Sedentary, Obese, Older Adults", "type": "source", "url": "https://doi.org/10.3389/fnagi.2022.892343", "year": 2022}, {"comparator": "not extracted", "directness": "review-level", "doi": "10.1186/s11556-026-00404-2", "effect": "not extracted", "endpoint": "not extracted", "id": "source_16", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Optimal type and dose of exercise to improve cognitive function in healthy and pre-sarcopenic older adults: a bayesian network meta-analysis of randomized controlled trials", "type": "source", "url": "https://doi.org/10.1186/s11556-026-00404-2", "year": 2026}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1016/j.jnha.2024.100377", "effect": "not extracted", "endpoint": "not extracted", "id": "source_17", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Biological sex as a tailoring variable for exercise prescription in hospitalized older adults", "type": "source", "url": "https://doi.org/10.1016/j.jnha.2024.100377", "year": 2024}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3233/ADR-220062", "effect": "not extracted", "endpoint": "not extracted", "id": "source_18", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Large-Scale Network Connectivity and Cognitive Function Changes After Exercise Training in Older Adults with Intact Cognition and Mild Cognitive Impairment", "type": "source", "url": "https://doi.org/10.3233/ADR-220062", "year": 2023}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3389/fnagi.2024.1432909", "effect": "not extracted", "endpoint": "not extracted", "id": "source_19", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Intermittent low-intensity and moderate-intensity exercise effects on cognition in community-dwelling older adults: a pilot study exploring biological mechanisms", "type": "source", "url": "https://doi.org/10.3389/fnagi.2024.1432909", "year": 2024}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3390/jpm11060530", "effect": "not extracted", "endpoint": "not extracted", "id": "source_20", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Exercise Improves Cognitive Function—A Randomized Trial on the Effects of Physical Activity on Cognition in Type 2 Diabetes Patients", "type": "source", "url": "https://doi.org/10.3390/jpm11060530", "year": 2021}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3389/fnagi.2022.921978", "effect": "not extracted", "endpoint": "not extracted", "id": "source_21", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Exercise Effects on Cognition in Older African Americans: A Pilot Randomized Trial", "type": "source", "url": "https://doi.org/10.3389/fnagi.2022.921978", "year": 2022}, {"comparator": "not extracted", "directness": "review-level", "doi": "10.1007/s40520-025-03233-y", "effect": "not extracted", 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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.", "type": "source", "url": null, "year": null}, {"comparator": "not extracted", "directness": "citation", "doi": null, "effect": "not extracted", "endpoint": "not extracted", "id": "source_45", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "**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.", "type": "source", "url": null, "year": null}, {"comparator": "not extracted", "directness": "citation", "doi": "10.1093/gerona/glp012", "effect": "not extracted", "endpoint": "not extracted", "id": "source_46", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Cesari 2009", "type": "source", "url": "https://doi.org/10.1093/gerona/glp012", "year": null}, {"comparator": "not extracted", "directness": "citation", "doi": "10.1111/j.1532-5415.2006.00701.x", "effect": "not extracted", "endpoint": "not extracted", "id": "source_47", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Perera 2006", "type": "source", "url": "https://doi.org/10.1111/j.1532-5415.2006.00701.x", "year": null}, {"comparator": "not extracted", "directness": "citation", "doi": "10.1093/ageing/afy169", "effect": "not extracted", "endpoint": "not extracted", "id": "source_48", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Cruz-Jentoft 2019", "type": "source", "url": "https://doi.org/10.1093/ageing/afy169", "year": null}, {"comparator": "not extracted", "directness": "citation", "doi": "10.1371/journal.pmed.0020124", "effect": "not extracted", "endpoint": "not extracted", "id": "source_49", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Ioannidis 2005", "type": "source", "url": "https://doi.org/10.1371/journal.pmed.0020124", "year": null}], "publication_id": "67cf5fb4-7f00-4a8d-a4d3-c4dec0ac54b5", "screening": {"excluded": 0, "exclusion_reasons": ["No PRISMA full-text exclusion-stage filter was applied."], "flow": ["identified", "screened", "excluded_with_reasons", "included"], "identified": 41, "included": 41, "included_or_retained": 41, "screened": 41, "wording": "41 candidate receipts retained after source retrieval, deduplication, and topic filtering. 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