Research
Hormonal
Sleep duration has a U-shaped association with weight gain, with greater weight gain occurring with less than 6 hours or more than 8 hours of sleep per night.
Aim for 6-7 hours of sleep per night. Both less than 6 hours and more than 8 hours are associated with greater weight gain. Prioritize consistent, adequate sleep for weight management.
GoodQualifiesHIGH confidence
Sleep duration had a U-shaped association with weight gain, with greater weight gain occurring with less than 6 hours or more than 8 hours of sleep per night.
Why this rating
Large cohorts, long follow-up, multivariable adjustments.
Source
Changes in Diet and Lifestyle and Long-Term Weight Gain in Women and Men
Dariush Mozaffarian et al. · New England Journal of Medicine · 2011
DOI 10.1056/nejmoa1014296
cohort · n=120877Cited 2,525×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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