Peer-reviewed study
Repeated short sleep can shift weight and waist measures
Prolonged Short Sleep and Its Effect on Body Weight and Composition: A Pooled Analysis of Randomized Trials
Last updated 2026-07-21
Source details
PubMed-linked study details.
- Authors
- Zuraikat et al.
- Journal
- Annals of Internal Medicine. 2026.
- Identifiers
- PMID 42407080 · DOI 10.7326/ANNALS-25-01660
Honest limits
What this study does not prove.
The average changes were modest and came from controlled sleep restriction in selected adults, so one short night cannot be assumed to create belly fat directly.
Kris's practical takeaway
Here's what to do with it.
Treat a run of short nights as part of the body-composition picture, especially when daily movement and food decisions are also drifting.
What to remember
Three useful reminders.
A run of short nights changes more than morning energy
Small daily shifts can add up across six weeks
Body composition is affected by the whole routine
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