Sleep · Brain health technique
Cold bedroom
Evidence grade: Context Dependent
Maintaining a cool ambient temperature to assist the body’s natural nighttime drop in core temperature, facilitating sleep onset and deeper stages.
- Practice
- Sleep
- Principle
- Restoration
- Tactic
- Calm And Comfortable Environment
- Evidence grade
- Context Dependent
- Strength of evidence
- Medium
- Cost
- Low
- Effort
- Low
- Time commitment
- Low
How to practice Cold bedroom
Set thermostat between 60–68°F, adjusting bedding for comfort. Use breathable sheets and light blankets.
The evidence behind Cold bedroom
Core body temperature decreases 1–2°F during sleep onset; cooler environments accelerate this process. Controlled trials show improved sleep latency and slow-wave sleep at 60–68°F (15–20°C). Overly warm rooms (>72°F) increase awakenings and reduce REM proportion. Mechanism: thermal regulation through vasodilation and hypothalamic signaling supports circadian alignment. Evidence is strong and consistent.
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