2、? The time for beauty sleep is from 22: 00 to 2: 00 in the morning.
3, staying up late for a long time, even if you sleep for 8 hours, it will be easy to endocrine disorders in a few years, and the physiological clock will be disrupted.
Children had better go to bed before 20:30 in the evening, because they have grown up.
Teenagers should go to bed around 22 o'clock in the evening.
6. As for those who love beauty, they must go to bed before 2 am, because the skin is metabolized before 2 am.
7. The elderly should sleep between 2 1-22 at night.
Deep sleep is a part of sleep, accounting for only 25% of the whole sleep time. Deep sleep is also called "golden sleep". People's sleep at night is generally divided into five to six cycles, and each sleep cycle is about 60 minutes to 90 minutes. According to the changes of EEG, EMG and eye movement during sleep, the sleep cycle consists of non-rapid eye movement cycle and rapid eye movement cycle.
Non-rapid eye movement sleep can be divided into four stages: light sleep, light sleep, moderate sleep and deep sleep, and then enter active sleep, which is regarded as the end of one sleep cycle, and then continue to start the next sleep cycle.
Extended data:
People should not sleep too long, 7-8 hours of day and night is enough for adults. If you want to gain health by increasing sleep time, it will be counterproductive, increase diseases and shorten life expectancy. Generally speaking, a normal sleep of 6-8 hours a day is enough.
If you miss your sleep because of work or other things, you can make up for it according to the amount of delay. Generally, the total compensation does not exceed two hours. Do some usual activities after getting up, and you will be full of energy and everything will return to normal. Too much compensation is not only useless, but also more trance, and even dizziness and other similar problems may occur.
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