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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Different age groups are different, and the most common sleep demand of adults is 7-8 hours. Generally speaking, newborns sleep no less than 20 hours a day; The baby is about 15 hours; School-age children are about 10 hour; 8 hours for adults; 5 ~ 6 hours for the elderly.
According to the China Sleep Index Report, in 20 15 years, the average daily sleep time of China people is 8 hours 12 minutes, which sounds like a long time. However, there are still 55.9% people in China who say they don't get enough sleep, and 48.6% people still feel sleepy after getting up. Therefore, the length of sleep varies greatly, which is related to many factors such as personal personality, health status, working environment, labor intensity and so on.
The score of sleep index truly reflects "sleep happiness". According to the occupation from high to low, they are civil servants, sales, financial practitioners, blue-collar workers, teachers, advertising/public relations people, corporate executives, medical personnel, IT practitioners and media people. Media people have been at the bottom of the sleep index for years.
If you want to get enough sleep and feel refreshed during the day, the first thing to do is to go to bed early and get up early, and staying up late is the least desirable; The second is to fight for a nap and rest. For insomniacs, Li Yan suggested not insisting on or delaying medical treatment. Drug treatment of early insomnia has a good effect. In addition to western medicine, there are many Chinese medicines and proprietary Chinese medicines that can effectively help sleep.
People's Network-When is the best time to sleep? Go to bed at 22: 30