Human lifespan evidence: no lifespan RCT — observational association only

Classification

Intervention class: Behavioral/physical-activity intervention (structured resistance/strength training)

Aliases: Strength training, Resistance training

Relationship to mTOR: Also NOT an 'mTOR inhibitor'. Resistance exercise is a classic acute activator of mTORC1 signaling in skeletal muscle, driving the muscle-protein-synthesis response that underlies training adaptation (hypertrophy/strength gains). This acute, muscle-localized activation is mechanistically the OPPOSITE direction from rapamycin's action and must not be conflated with organism-level 'mTOR activity' claims.

Mechanism summary: Mechanical loading during resistance training acutely activates mTORC1 signaling in skeletal muscle, promoting the protein-synthesis response underlying strength/hypertrophy adaptation. See /mtorc1-vs-mtorc2 for the complex-level map.

Regulatory status

Behavioral intervention; not a drug. No regulatory approval framework applies.

Human (activity-mortality meta-analysis, observational, pooled)   Tier 4 · Prospective human observational verification: verified_2026-07-11
1. Species / populationAdults, pooled observational cohorts (activity-mortality meta-analysis)
2. Exposure, route, schedulePhysical activity of approximately 8.75 MET-hours/week (roughly 150 minutes/week of moderate-intensity activity; this pooled meta-analysis does not isolate resistance-only exposure)
3. Comparator & durationLower/no reported activity; prospective observational follow-up
4. Endpoint & numeric resultAll-cause mortality relative risk (RR) 0.69 at this activity level, relative to the low/no-activity comparator
5. What this study did NOT establishObservational -- does not establish causation via RCT. Does not isolate resistance-only vs. aerobic-only modality. Does not establish an mTOR-pathway mechanism for the mortality association.
Human (MASTERS trial: resistance training + metformin interaction)   Tier 2 · Human clinical/functional RCT verification: verified_2026-07-11
1. Species / populationOlder adults, supervised resistance-training program, MASTERS trial
2. Exposure, route, scheduleStructured resistance-training program, with or without concurrent metformin
3. Comparator & durationResistance training + placebo vs. resistance training + metformin; trial duration per MASTERS protocol
4. Endpoint & numeric resultResistance training alone produced expected muscle mass/strength gains; concurrent metformin BLUNTED these gains relative to training + placebo
5. What this study did NOT establishDid not test lifespan. Establishes a training-drug interaction (metformin blunts exercise adaptation), not an independent resistance-training lifespan effect.

MASTERS: concurrent metformin blunted resistance-training-induced muscle mass/strength gains relative to training + placebo. [study record] verification: verified_2026-07-11

Safety notes

Behavioral intervention; general exercise-safety guidance (e.g. medical clearance and appropriate supervision/progression for resistance training) is standard clinical advice not specific to this dataset. No drug label applies.

Source: (not applicable (no drug label; behavioral intervention)) verification: verified_2026-07-11

Editorial policy: This site publishes no specific training-program prescription and no dosing calculator for exercise 'longevity protocols'.

Funding / conflict of interest

Funding sources and conflict-of-interest disclosures for individual studies are not reproduced here pending primary-source verification; see each linked study record.

Version 0.2.0-mvp · literature search date 2026-07-11 · editorial owner Nabus Research