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Bed Cooling & Sleep Temperature (N=1 Data)
Reducing bed temperature from 68°F to 62°F during deep sleep increased HRV by 15% over 4 months in a single triathlete.
N=1 Evidence
Eight Sleep Pod 5: 68°F → 62°F (deep sleep) → 70°F (wake-up)
- HRV: +15% average
- Duration: 4 months
- Device: Eight Sleep + Oura
- No other changes noted