Scientists found the strength training sweet spot for a longer life
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- Researchers found that 90–119 minutes of weekly strength training was associated with a 13% lower risk of death from any cause, a 19% lower risk of cardiovascular death, and a 27% lower risk of neurological disease death, with no additional benefit above 120 minutes per week.
- Cancer mortality reductions appeared at much lower strength training doses: just 1–29 minutes per week was linked to a 21% lower risk of cancer death, and 30–59 minutes to an 18% lower risk.
- Combining strength training with aerobic exercise produced the strongest results, with participants doing 45+ MET hours of aerobic activity per week showing 53–58% lower mortality risk regardless of strength training volume.
- The study analyzed data from three long-running cohorts — the Health Professionals Follow-up Study, the Nurses' Health Study, and the Nurses' Health Study II — tracking participants for up to 30 years, with 35,798 deaths recorded over follow-up.
- Researchers flagged key limitations: exercise habits were self-reported, the analysis excluded calisthenics and Pilates, and no data was available on workout intensity or session duration, meaning causation cannot be established from this observational design.
Why it matters: The findings give clinicians and public health guidelines a concrete dose target — 90–120 minutes weekly — rather than vague encouragement, with distinct benefit thresholds for cancer versus cardiovascular and neurological mortality. For the roughly 54% of participants who reported no strength training at all, the gap between zero and even 30 minutes a week may be the most actionable takeaway, though the observational design means the numbers reflect association, not proven causation.
