Prolonged Sleep Restriction May Increase Body Weight - Report - MDSpire

Prolonged Sleep Restriction May Increase Body Weight

In a pooled analysis of two randomized crossover trials, reducing nightly sleep by about 1.5 hours for 6 weeks was associated with modest increases in body weight and waist circumference without measurable changes in body composition.

  • By

  • Andrea Surnit

  • July 9, 2026

  • 3 min

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Clinical Report: Prolonged Sleep Restriction May Increase Body Weight

Overview

A pooled analysis of two randomized crossover trials indicates that reducing sleep by approximately 1.5 hours nightly for six weeks may lead to modest weight gain in adults at elevated cardiometabolic risk. The study found an average increase of 0.45 kg in body weight and changes in waist circumference and body volume during the sleep restriction period.

Background

Sleep duration is a critical factor influencing health and metabolic processes. Insufficient sleep has been linked to obesity and other cardiometabolic risks.

Data Highlights

OutcomeChange
Body Weight+0.45 kg
Waist Circumference+0.52 cm
Whole-body Volume+0.56 L
Fasting Leptin ConcentrationsIncreased
Sedentary Behavior+17 minutes/day

Key Findings

  • Sleep restriction reduced nightly sleep duration by an average of 78 minutes.
  • Participants experienced a mean weight gain of 0.45 kg during the sleep restriction period.
  • Waist circumference increased by 0.52 cm and whole-body volume by 0.56 L with sleep restriction.
  • Higher fasting leptin concentrations were observed during the sleep restriction phase.
  • Participants engaged in 17 more minutes of sedentary behavior per day during sleep restriction.
  • No significant differences were found in body composition metrics or appetite-related hormones aside from leptin.

Clinical Implications

Clinicians should consider the impact of sleep duration on weight management, particularly in patients with elevated cardiometabolic risk. Monitoring sleep patterns may be a valuable component of comprehensive obesity care.

Conclusion

The findings indicate that sustained moderate sleep restriction can lead to modest weight gain in adults at risk for cardiometabolic issues.

Related Resources & Content

  1. Zuraikat FM, et al., Annals of Internal Medicine, 2026 -- Prolonged Sleep Restriction May Increase Body Weight
  2. Frontiers in Pediatrics — Protocol for a randomized controlled trial investigating the effects of sleep extension on body weight and learning in children (More2Sleep)
  3. The Journal of Clinical Endocrinology & Metabolism — Impact of Sleep Duration on Insulin Sensitivity Changes Induced by Overfeeding
  4. conexiant — Sleep Duration Signals Metabolic Change
  5. Frontiers in Psychiatry — Environmental adaptation and sleep disturbance: a cross-sectional study reveals distinct metabolic risk profiles in long-term high-altitude residents versus the general population
  6. Screening, Diagnosis, Evaluation, and Staging of Obesity in Adults: Standards of Care in Overweight and Obesity—2026 - PMC
  7. Impact of Sleep Duration on Insulin Sensitivity Changes Induced by Overfeeding
  8. Sleep Duration Signals Metabolic Change
  9. My Bibliography - NCBI
  10. Reallocating 24-hour movement behaviors and cardiometabolic health in adults: a systematic review and meta-analysis | Archives of Public Health | Springer Nature Link

Original Source(s)

Prolonged Sleep Restriction May Increase Body Weight

  • by Andrea Surnit

  • July 9, 2026

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