Sleep is the most underrated factor in weight management. Research shows that even one night of poor sleep can increase hunger hormones by up to 45%.
The Hormonal Impact
When you don’t sleep well:
- Ghrelin (hunger hormone) increases
- Leptin (satiety hormone) decreases
- Cortisol stays elevated, promoting fat storage
- Insulin sensitivity drops
What Good Sleep Looks Like
Quality sleep isn’t just about hours. Key metrics include:
- Deep Sleep: 15-20% of total sleep for physical recovery
- REM Sleep: 20-25% for cognitive function and emotional regulation
- Sleep Efficiency: 85%+ time in bed actually sleeping
- Consistency: Regular bed/wake times ±30 minutes
Optimization Strategies
- Temperature: Cool bedroom (18-20°C) promotes deeper sleep
- Light Exposure: Morning sunlight, evening dim lights
- Meal Timing: Last meal 3+ hours before bed
- Caffeine Cutoff: None after 2 PM
Track It with Pulselyze
Connect your Oura, Apple Watch, or Withings to see sleep patterns alongside weight trends. Our AI finds correlations you’d never spot manually.