SOURCE-LINKED STUDY SUMMARY
Effect of Sleep Extension on Objectively Assessed Energy Intake Among Adults With Overweight in Real-life Settings: A Randomized Clinical Trial.
Full paper summarizedQuality not appraised
- What was studied
- Randomized trial testing whether sleep extension changes objectively estimated energy intake, expenditure and weight in everyday life.
- Who / model studied
- 80 analyzed adults aged 21–40 with overweight and habitual sleep below 6.5 hours nightly.
- Studied dose & schedule
- After 2 baseline weeks, individualized counseling targeted 8.5 hours in bed for 2 weeks versus habitual sleep; no prescribed diet or exercise.
- What the study found
- Sleep increased 1.2 hours/night. Energy intake changed by −270.4 kcal/day versus control (95% CI −393.4 to −147.4). Total energy expenditure did not significantly change. Weight change differed by −0.87 kg; this was not all fat loss.
- Limitations & context
- Short, single-center study with selective eligibility; sustained weight loss remains untested. Intake was calculated from energy expenditure and body stores. Detailed adverse-event results were not reported in the assessed main text.
Read summary source ↗ · Prepared 10/6/2026 · AI-assisted, source-based summary
Review record & corrections
Summary prepared: . Source scope: full paper. This is an AI-assisted source summary, not an independent clinician sign-off.
No public field-by-field revision history is available for this card yet. The date above is the summary date, not proof that every field was updated then.
Inspect the source · Correction policyResearch findings apply to the population and conditions studied. This educational summary is not a treatment recommendation or a formal assessment of study quality.
Original publication ↗ · DOI: 10.1001/jamainternmed.2021.8098