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Sleep Tech

Sleep Optimization Stack

Goal: Deep sleep & recovery

Sleep quality -- not just duration -- drives recovery and cognitive performance. This protocol stacks evidence-based interventions: temperature manipulation, light management, and timing to maximize slow-wave sleep (SWS) and REM.

Sleep Optimization Stack

Deep sleep & recovery

Sleep surface temp
65-68°F (18-20°C)Strong Evidence
Room temperature
65-68°F ambientStrong Evidence
Lights out timing
Same time nightly (+/- 30 min)Strong Evidence
Blue light cutoff
2h before bedModerate Evidence
Morning bright light
10-30 min sunlight within 1h of wakingStrong Evidence
Caffeine cutoff
10-12h before bedtimeStrong Evidence
Alcohol
Avoid -- suppresses REM sleepStrong Evidence

Temperature is the most underrated sleep lever. Your body needs to drop its core temperature by 1-2 degrees Celsius to initiate and maintain sleep. A cool bedroom and cooling mattress pad are not luxuries -- they are physiological requirements.

M
Matthew Walker, PhD
Professor of Neuroscience & Psychology, UC Berkeley

Research Behind This Protocol

Core body temperature drop of 1-2°C is required to initiate sleep. Cooling the sleep surface to 65-68°F facilitates this drop, increasing slow-wave sleep duration.

Harding et al.Frontiers in Neuroscience(2019)

The Temperature Dependence of Sleep

PubMedDOI

REM and SWS are both critical for memory consolidation and cellular repair. Alcohol and inconsistent sleep timing are the two largest suppressors of sleep quality in adults.

Walker et al.Nature Reviews Neuroscience(2017)

Why We Sleep: Unlocking the Power of Sleep and Dreams

PubMedDOI

Equipment for This Protocol

See our evidence-ranked sleep tech buying guide for the best gear to implement this protocol.

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