Lesson 7
The Temperature Drop
See how heat leaves your body as you fall asleep, and set up your bed so it can.
Builds on
Sleep rides a falling temperature
You fall asleep as your core temperature falls. The body clock lowers it through the evening and night, as part of the same daily rhythm that times melatonin, so on most nights you don't have to do anything to make it happen.
It's a rhythm, not a target. You don't need to cool yourself by a degree, or by any fixed amount, to sleep. What you need is for the heat to be able to leave: from your core to your skin, through whatever you're wearing and lying under, and out into the room.