Do you really need 10,000 steps a day?

Cohort study. 16,741 people. 4.3 years mean follow-up.

People were watched for years. Nobody was told what to do. A clue, not proof.

Who: Older US women from the Women's Health Study (mean age 72.0, range 62-101), mostly white and of higher socioeconomic status, who could walk outside the home without help; accelerometer worn 2011-2015

Maybe healthy women just walked more.

More to know, from our read of the paper:

• Observational: linked, not proven. The authors say reverse causation 'remains a possibility'
• Older women only (mean age 72), mostly white and higher socioeconomic status: unclear whether it applies to men, younger people, or more or less active populations
• Steps were measured once (a single ~7-day wear), not repeatedly
• Only all-cause mortality was studied
• The top quartile's median was 8442 steps/d and the spline was truncated at 13,500 steps/d. A leveling-off means no extra benefit was seen above ~7,500, not that more steps are harmful

16,741 older US women (average age 72) wore a step counter for one week, and scientists checked who died over about 4 years (a cohort study). Women who took about 4,400 steps a day had a 41% lower death rate than women who took about 2,700. More steps looked better up to about 7,500 a day; above that, no extra help was seen (that doesn't mean more is bad). Nobody was told to walk, so this is linked, not proven: healthier women may simply walk more. And the 10,000 goal likely comes from the name of a 1965 Japanese step counter.

We read the abstract and the full text of this paper and checked every number on this page against it (14 facts, checked on 2026-09-26). The study design is named above. Cohort and other observational studies are described as linked, not proven. Found an error? Email theis@onestudyaday.com.