How The Body Regulates Sleep
The body regulates sleep with two key drivers:
- Sleep-wake homeostasis. The longer you’re awake, the more you feel a need to sleep. This is because of the homeostatic sleep drive, the body’s self-regulating system in which pressure to sleep builds up based on how long you’ve been awake.
- The circadian alerting system. Light exposure is the biggest influence on circadian rhythms, encouraging wakefulness during the day and sleepiness at night.
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