eli5 Circadian Rhythym. how do people that don’t know what time it is when they fall asleep still wake up at the same time every day?

Question

eli5 Circadian Rhythym. how do people that don’t know what time it is when they fall asleep still wake up at the same time every day?

In: 34

Answer 1

Your body has various clocks and mechanism. So various hormones such as melatonin and just stuff like temperature control your circadian rhythm.

Basically you have biological clocks that control you.

Like mechanical clocks, it’s not perfect and can drift and get longer.

So your body uses things like getting bright light in the morning, exercise, meal times, lack of bright light in the evening, etc. to set and calibrate your circadian rhythm.