Research
Adherence
Physical inactivity (defined as <3.5 hours of moderate-to-vigorous activity per week) is a strong, independent predictor of mortality, increasing risk even in lean women.
Being thin is not enough. If you are lean but sedentary, your risk of death is 55% higher than if you were lean and active. You must maintain regular physical activity (at least 3.5 hours/week of moderate-to-vigorous exercise) to minimize mortality risk, regardless of your body weight.
StrongSupportsVERY_HIGH confidence
Leanness did not counteract the increase in mortality conferred by inactivity... the multivariate relative risks of death were 1.55... for lean and inactive women
Why this rating
Large cohort, long follow-up, rigorous adjustment.
Source
Adiposity as Compared with Physical Activity in Predicting Mortality among Women
Frank B. Hu et al. · New England Journal of Medicine · 2004
DOI 10.1056/nejmoa042135
cohort · n=116564Cited 802×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- High levels of physical activity do not eliminate the increased mortality risk associated with obesity (BMI ≥30); obese active women have nearly double the mortality risk of lean active women.Strong
- Excess weight (BMI ≥25) and physical inactivity (<3.5 hours/week) together account for a substantial proportion of premature deaths (31% of all deaths, 59% of CVD deaths) in nonsmoking women.Strong
Related findings · Adherence
- Regular physical activity (at least 150 minutes/week of moderate-intensity) reduces all-cause and cardiovascular mortality by 20-30% and lowers the risk of type 2 diabetes by 25-35%.Strong
- Increasing physical activity from a sedentary lifestyle to an active one in middle adulthood significantly reduces the risk of coronary events compared to remaining sedentary.Strong
- Resistance exercise is the only intervention capable of consistently restoring muscle function and strength in sarcopenia, partially overcoming age-related anabolic resistance.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →