Derivation Web

source_23a9421d23fb4b00

by researka:v2 · 2026-05-23 08:50:53.416551+04:00

{"contradictions": ["Aerobic exercise is widely promoted for healthy aging, yet the evidence linking it to cardiometabolic and functional outcomes in older adults remains heterogeneous, raising the question of whether mechanistic plausibility translates into consistent clinical benefit.", "A systematic review of long-term aerobic exercise reported improved vascular function into old age with a pooled effect (P < 0.001), yet individual studies frequently returned null cardiometabolic results, creating cross-study disagreements across outcome classes in the evidence matrix (Campbell 2019).", "We conclude that aerobic exercise possesses genuine mechanistic support—particularly for inflammation and vascular function—but the anti-aging clinical case as currently constituted is incomplete: functional outcomes are inconsistent, drug–exercise interactions selectively suppress expected adaptations, and boundary conditions for dose, modality, and comorbidity status remain to be established by adequately powered trials.", "26 included sources were assigned to this outcome class. Directional coding: mixed=2, negative=2, null=16, positive=3, unclear=3. Directness coding: indirect=22, review=4.", "4 included sources were assigned to this outcome class. Directional coding: mixed=1, negative=1, null=2. Directness coding: indirect=4.", "The curated corpus is dominated by observational cohort designs, with no long-term mortality-focused randomized controlled trial of aerobic exercise in non-diabetic older adults included. Outcomes related to all-cause mortality and hard cardiovascular events were addressed only indirectly — for example, Moore 2012 and Mok 2019 reported pooled cohort associations between leisure-time physical activity and mortality, but neither constituted a controlled intervention trial. Consequently, causal claims linking aerobic exercise to survival benefit in this synthesis remain inferred rather than demonstrated. This gap is clinically significant because mortality reduction is often the ultimate justification for exercise prescription in aging guidelines, yet the corpus lacks the trial-level evidence needed to confirm or quantify that benefit.", "Several outcome domains are represented by a single study within the corpus, precluding internal replication or meta-analytic pooling. For instance, Konopka 2019 alone examined the interaction between metformin and aerobic exercise on mitochondrial adaptations, while Gillen 2016 alone compared sprint interval training to moderate-intensity continuous training for cardiometabolic outcomes. Single-trial findings cannot be cross-validated within the synthesis, leaving their effect-size estimates vulnerable to idiosyncratic sample characteristics. Similarly, dose-response evidence for aerobic exercise on cognition rests on a single pilot RCT (Vidoni 2015), and no other included study directly tests dose as a moderating variable for cognitive endpoints.", "Where the corpus has mechanistic or biological-plausibility evidence, clinical claims remain inadequately supported. Yet no included study links these mechanistic changes to downstream clinical endpoints such as hospitalization, disability-free survival, or quality-adjusted life years. This mechanism-to-clinic gap means that the synthesis cannot bridge from biological signal to treatment recommendation without additional trial evidence that connects the intermediate biomarker changes to patient-relevant outcomes.", "The final interpretation is deliberately tiered. Aerobic Exercise has a biologically plausible geroscience rationale and selected clinical signals, but the corpus does not support treating mechanistic target engagement, intermediate biomarkers, and patient-relevant outcomes as interchangeable evidence."], "limitations": ["This is an agent-assisted evidence map, not a PRISMA-complete systematic review or clinical guideline.", "It is not PROSPERO-registered and should not be read as medical advice.", "Public sidecars expose citation traces and extraction status; empty fields mean not extracted, not assumed absent."], "publication_id": "4e939420-aa6e-4b0e-9f24-335cb59cf96d", "screening": {"excluded": 0, "exclusion_reasons": ["No PRISMA full-text exclusion-stage filter was applied."], "flow": ["identified", "screened", "excluded_with_reasons", "included"], "identified": 129, "included": 129, "included_or_retained": 129, "screened": 129, "wording": "129 candidate receipts retained after source retrieval, deduplication, and topic filtering. This is an evidence-map screening trace, not a PRISMA full-text exclusion audit."}}

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