People must keep a scientific sleep time. For newborns, they need to sleep 16 hours every day, which is a normal sleep time. As they get older, their sleep time will decrease. However, the sleep time of adults is shorter than that of children, and most of them stay at about eight hours. This is a scientific sleep time and should be kept at 6-8 hours every day.

Correct sleep time

Newborns sleep 16 hours a day on average, and the sleep time of infants is gradually shortened, and they sleep about 9 ~ 12 hours at the age of 2. The sleep time of adults varies from person to person, generally ranging from 6 to 9 hours, and it is generally considered that 7 and a half hours is appropriate. But old people usually only sleep for six hours.

According to EEG analysis, the heterogeneous sleep of newborns accounts for about 50% of the total sleep time, and soon enters the heterogeneous period after falling asleep, accounting for about 20% of adults and less than 20% of the elderly. In adults, those who sleep less than 15% or more than 25% are considered abnormal. Similarly, the fourth phase of slow wave phase decreases with age. As for the cycle of sleep and awakening, newborns sleep about 5-6 times a day, infants gradually decrease, and school-age children sleep about 1-2 times a day. Some old people have returned to the habit of sleeping several times a day.

The default "sleep time" of "biological clock" is "wake up" 6-8 hours after sleep; And when to "sleep" is not the most important. As long as you "sleep", those "physiological activities" that will happen after sleeping will still be carried out, or: as long as you have enough "sleep time", no matter when you start sleeping, it will not affect your "health"; "Work and rest time" is just a "habit" and can be changed at will. Of course, it takes some time to form a new habit, usually 3-6 days, so it is best not to alternate this habit too often.

Sleep time varies from person to person. Although the average sleep time of adults is eight hours a day, in fact, adequate sleep does not depend on the length of time, but on whether you can reach a state of deep sleep. Experts suggest that sleep time should generally be kept at 7 to 8 hours, which varies from person to person. If you really fall asleep quickly and deeply, and generally don't dream or dream less, sleeping for 6 hours can completely restore your energy, of course. However, those who fall asleep slowly and shallowly, sleep more, and often dream more, even if they sleep for 10 hours, their spirits are still difficult to refresh themselves. It is not good for their health to get effective sleep through various treatments.