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Canon
Sleep Loss Increases Appetite and Weight Gain
research · controlled lab and epidemiological studies (St-Onge, others) (2010)
Confidence: High
Even moderate sleep restriction (4-6 hours per night) increases hunger and alters hunger-regulating hormones, leading to increased caloric intake and weight gain, with evidence that weight can increase even without eating more.
Core Concepts
The Problem
People often neglect sleep as a factor in weight management.
The Claim
Inadequate sleep dysregulates appetite hormones, making weight loss and maintenance more difficult.
Key Evidence
- •Controlled studies show increased hunger and changes in appetite hormones after sleep restriction
- •Observational studies link short sleep to obesity risk
- •St-Onge's research on sleep loss and metabolic health
Practical Implication
Prioritizing sleep is as important as diet and exercise for weight control.
Nuance & Limits
Effects may differ by sex; also, sleep quality matters.
Source Material
Citation Density
High
Gaps
- ⚠ Long-term intervention studies on sleep extension for weight loss are sparse
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