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Temperature-Swapped Sleep for Better REM
Keep the sleep environment cooler at the start of the night, then gradually warmer toward morning. The idea is to support deeper slow-wave sleep early and more REM sleep later, since warming the bed or room in the last couple of hours was described as boosting REM.
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“I discovered through the AI that my mattress was applying and I was told that heating your sleep environment toward the end of the night increases your REM sleep dramatically, whereas cooling it at the beginning of the night increases your deep sleep.”
huberman · Enhance Your Learning Speed & Health Using Neuroscience Based Protocols | Dr. Poppy Crum · Sep 29, 2025 · 1:09:00 · open ↗
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