A Harvard study by Ralph Paffenbarger tracked alumni for 25-30 years and found that the effect of physical activity on health outcomes increased with age: alumni in their 20s-40s exercising 4-5 times weekly had 20% lower death rates, while alumni 60-70 who exercised had 50% lower death rates.
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Daniel LiebermanEvidence Quote
“alumni in their 20s, 30s, and 40s... exercising four, five times a week... 20% lower death rates. By the time they got to their 60s and 70s... 50% lower death rates.”
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Harvard Professor: REVEALING The 7 Big LIES About Exercise, Sleep, Running, Cancer & Sugar!!!— The Diary Of A CEOCreated: 8/12/2026, 6:22:05 PM
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