First, the longer you sleep, the better for you;

Many people think that the longer you sleep, the better for your health. Actually, it is not. Generally speaking, it is enough for a healthy adult to sleep about 7 hours a day. Moreover, there are individual differences between people, and everyone needs different sleep time. Judging a person's sleep quality depends not only on the time of sleep, but also on the quality and regularity of sleep. Sleeping too long will do harm to the human body. Clinical studies have found that if a healthy adult sleeps more than 10 hour every day, his reaction ability and cardiovascular function will be reduced to varying degrees. Therefore, people should pay more attention to the quality of sleep in daily life, so as to achieve the regularity of sleep, not just the time of sleep.

Secondly, dreaming is harmful:

Many people think that dreaming is harmful and will make people have a bad rest. This view is wrong. Dreaming is a normal physiological phenomenon of human beings, and every normal person dreams during sleep. Generally speaking, it is normal for a person to dream no more than four times a night, which will not affect the quality of sleep. However, it should be noted that if a person often has nightmares or dreams too many times (more than four times a night, or even a dozen times), he should see a doctor in time, otherwise, not only the quality of sleep will be difficult to guarantee, but also the body will have problems.

Third, the role of drinking to help sleep:

Traditionally, wine has hypnotic effect. So many people like to drink some wine before going to bed, thinking that it can make people fall asleep quickly. However, experts tell us that this practice is not desirable. People drink alcohol before going to bed, although alcohol can paralyze nerves and help people fall asleep. But if you do this for a long time, it will make people's nerves dependent on alcohol. Once this dependence is formed, it is difficult for people to fall asleep without drinking, which leads to insomnia. In addition, drinking alcohol before going to bed will make harmful substances such as alcohol accumulate in the human body for a long time, which will damage the retina and reduce the human body's reaction ability. Therefore, people should never drink alcohol before going to bed. Even if you are sleepy after drinking too much, you should stick to 1 hour before going to bed.

Four, nap is harmful to health:

Whether a nap is harmful to health has always been a controversial topic. However, the latest research results show that siesta can coordinate the human biological clock and inhibit human aging. Taking a nap for a long time can reduce the incidence of cardiovascular diseases by 30%. But it should be noted that not everyone is suitable for a nap. Some people who are overweight by more than 20% or suffer from hypotension and circulatory diseases are not suitable for taking a nap. Because a nap will lead to local blood supply shortage in these people, which will lead to a stroke. In addition, the average person's nap time should not be too long, generally 15 ~ 30 minutes is appropriate.