Mixing Workouts Cuts Death Risk 19%: 30-Year Study
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- BMJ Medicine published research analyzing data from the Nurses' Health Study (121,700 women) and the Health Professionals Follow-Up Study (51,529 men), finding that participants who performed the most diverse range of activities had a 19% lower risk of death from all causes after accounting for total exercise volume.
- Activity variety was independently associated with a 13-41% lower risk of death from cardiovascular disease, cancer, respiratory disease, and other causes, with benefits holding regardless of how much total exercise participants reported.
- Walking showed the strongest single-activity association, with the most active walkers having a 17% lower mortality risk compared to the least active; climbing stairs daily was linked to a 10% lower risk.
- Tennis, squash, or racquetball were linked to a 15% lower risk of death, while rowing or callisthenics showed a 14% reduction; weight training and running were each associated with a 13% lower risk, jogging with 11%, and cycling with a smaller 4% decrease.
- The mortality benefits of total physical activity appeared to level off after approximately 20 weekly MET hours, suggesting a 'sweet spot' beyond which additional exercise provided diminishing returns.
- During more than three decades of follow-up, 38,847 participants died — including 9,901 from cardiovascular disease and 10,719 from cancer — providing the mortality data underpinning the study's conclusions.
- Researchers flagged limitations including self-reported physical activity data and a study population that was mostly White, noting the findings may not generalize broadly across racial and ethnic groups.
Why it matters: The 30-year BMJ Medicine study, tracking 111,467 participants, reframes the longevity question from 'how much do you exercise' to 'how many different activities do you do' — with a 19% all-cause mortality reduction tied to variety and a leveling-off point at roughly 20 weekly MET hours, giving exercisers a concrete ceiling beyond which more effort may not extend life further.
