How many hours does an adult sleep normally?

The sleep demand of adults is 7-8 hours. It is recommended to go to bed before 22: 30, go to bed at 23: 00 and get up around 7: 30 the next day.

This is because the human body produces energy during the day (5: 00-2 1) and starts cell division at night (2 1- 5:00 the next day) to convert energy into new cells. It's time for human cells to recuperate and innovate. That is, people rotate with the earth to the side facing away from the sun, and the yin is quiet, which is a good time for people to sleep. Only by resting at this time can they have a good state of mind and body.

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