A person's sleep to wake up is called a big sleep cycle, which is divided into various small cycles, such as light sleep, deep sleep and the transition from light sleep to deep sleep. Sometimes a big cycle has two, three or even five or six cycles, and each small sleep cycle is different, with a time period and a long time. Generally speaking, people's sleep varies from person to person and is not a constant level. However, the cycle of human beings from shallow sleep to deep sleep and from deep sleep to shallow sleep is the same.
As the previous article has said, sleep is a very important way for human beings to restore physical strength, enhance immunity and recover after illness, so the importance of sleep can be seen, which is beyond doubt. Speaking of which, it is necessary to talk about the quality of sleep. If the quality is good, it means that the short time from shallow sleep to deep sleep is very few, and the natural deep sleep time is long enough, so it doesn't matter if the whole sleep time is short, and the spirit is enough the next day. On the other hand, if there are many small cycles in the whole sleep week, you always go from shallow sleep cycle to deep sleep, and deep sleep will naturally be less, and you are always half asleep. It's no use sleeping for a long time, and you will naturally feel groggy and sleepy the next day. This is the relationship between sleep quality and sleep time.
Inheritance is a wonderful thing. Some families have less genetic sleep and insufficient deep sleep, which always gives people the feeling of less sleep and insufficient energy. Some families tend to have poor sleep quality, more shallow sleep and less deep sleep. He must sleep for a long time to achieve energetic effect.
After long-term tracking and data analysis by relevant research institutions, people's sleep time is about 7 hours. As long as it is around this standard, it is healthy. Then we propose that human sleep time is 7 1 hour. Of course, during the investigation, some people sleep very little or very long, such as sleeping for three or four hours, or sleeping for ten hours. This is a rare case. There may be only one in 10,000 people, or even only one in 65,438+10,000 people. In addition, this law will change with some external factors, such as daytime activities, sports, work types and so on. For example, with proper exercise during the day and 20 minutes of sunshine during the day, his brain is always awake and not sleepy during the day, and he may have more deep sleep time at night. On the contrary, he does not exercise during the day, sits in the office, has no sunshine during the day, and even dozes off during the day. That night, he had less deep sleep and more shallow sleep. Because the brain has begun to feel the rhythm of sleep during the day, unlike people who do not doze off during the day, they will feel this way when they sleep deeply at night.
According to the relevant data of research institutions around the world, human life span is related to the length of sleep, but the longer the sleep time, the longer the life span, and the longest life span is about 7 hours. As little as six or six hours, as long as nine hours, the service life is shortened. So it is not that the longer you sleep, the better. We are concerned about the quality of sleep. Therefore, 7 1 hour is recommended. Sleeping less than six hours and more than nine hours are not healthy.