The best sleep time for people should be between 1 1: 00 at night and 2: 00 in the morning, which is the so-called golden three-hour sleep. The best time for human hematopoiesis is from 6: 00 pm to midnight 1 40 pm, and the human body must reach a state of deep sleep. 10 to 1 is the time for body repair, that is, the best sleep period. Sleep is a problem in college! As the saying goes, going to bed early and getting up early is good for your health. There is only one concept, no quantification and no meaning. The key to sleep quality lies in deep sleep. It can be said that only 2~3 hours of sleep is enough. Usually 0 to 3 o'clock is the time for deep sleep, but you can't go into deep sleep as soon as you fall asleep. There is a transition period, usually 1~ 1.5 hours! Conversely, it is best to go to bed from 22: 30 to 23: 00 to prepare for a deep sleep! The recommended work and rest time is: 22: 00 ~ 23: 00 in summer-> 6: 00 ~ 7: 00 in sleep-> 21:30 ~ 22: 30 in winter-> Fall asleep at 6:30-7:30-> At noon, people's alertness is declining. At this time, taking a nap helps to restore the spirit and is good for work, study and health.