Why do people sleep every day?

Why do people sleep: What positive effects does sleep have on physical and mental health? No matter men, women and children, sleep is essential for everyone living in this world. What positive effects does sleep have on people's physical and mental health? The main points are as follows. (1) Eliminate fatigue: In our daily life, we all know that when you are in poor health or feel exhausted after strenuous activities, if you can get a good sleep, your physical strength and energy will recover quickly. This is because all tissues and organs of the human body are in the process of constant physiological activities. On the one hand, they consume a lot of nutrients, on the other hand, they also accumulate a lot of metabolic waste. When these wastes, such as lactic acid, accumulate to a certain extent, people will feel tired. This is a protective response of the human nervous system to the accumulation of metabolic waste in the body. At this time, if we don't stop to rest, our physiological function will be damaged, the regulation of the nervous system will fail, and our resistance will also decline. (2) Prevention and treatment: Regular daily life has many positive effects on a person's health. Adequate and proper sleep can not only prevent the occurrence of diseases, but also promote the alleviation and improvement of diseases when they have already occurred. First of all, from the aspect of disease prevention, there is a very telling experiment: two groups of monkeys, one in a state of fatigue and the other in a state of fatigue, are injected with the same amount of pathogenic bacteria at the same time. As a result, the tired monkey was infected and sick, while the tired monkey was safe and sound. It can be seen that adequate sleep and rest are of great significance to prevent diseases. When a person is sick or has a cold or fever, the common folk treatment is to let the patient sleep first, and most patients can feel much more relaxed after waking up. This is not unreasonable. Dr. Koluka of Harvard University in the United States believes that mammals can store cell wall acids produced by bacteria in the body in the brain to promote sleep and ensure the normal rest of the human body, which is particularly important when they are sick. When people get sick, the cell wall acid regenerated by bacteria will increase, thus increasing sleep, and the immune process of the body will also increase accordingly, which is conducive to the recovery of the disease. (3) Promoting development: For a growing child, the quality of physical development is closely related to the quality of sleep. The growth and development of children are controlled by growth hormone. If the growth hormone secretion is sufficient, the child's development will be better. If the secretion of growth hormone is reduced, the growth and development of children will be slow. This kind of growth hormone, which can promote growth and development, is mostly secreted during sleep, and the secretion decreases or stops after waking up. Therefore, if children want to grow and develop well, they must have enough sleep. (4) Improve intelligence: A person's work efficiency, agility in accepting and responding to things, memory ability and thinking ability are all closely related to sleep quality. Especially for young students, their IQ and academic performance are more closely related to whether they get enough sleep. Some research data show that the academic performance of primary school students aged 7-8 is obviously related to sleep time. Of the children who sleep less than 8 hours a day, 665,438+0% are poor at school, some still can't keep up at work, and 39% barely reach the average score, but none of them are among the best. Among the children who sleep about 10 hours every night, only 13% have poor academic performance, 76% have moderate academic performance, and 1 1% have excellent academic performance. It shows that the child's sleep is closely related to his intellectual development. Therefore, every primary school student's parents, in order to make their children's academic performance better, must let their children have enough sleep first. (5) Longevity: About one-third of a person's life is spent in sleep, which seems to be a waste of time for a person who cherishes time, but it is not. If a person doesn't get enough sleep, his life span will be shortened obviously. Modern scientific research has confirmed that all physiological activities in the body will slow down during sleep and are in the process of recovering and re-accumulating energy. If you don't sleep or suffer from insomnia for a long time, it will cause nervous system dysfunction, reduce the immune function of the body, and even lead to recession in severe cases. Some people found that the increase of plasma total fat, β-lipoprotein and cholesterol is the main factor of arteriosclerosis when detecting the blood of people with insufficient sleep. Kripke, a professor of psychology at the University of California, USA, conducted a six-year follow-up survey of 6.5438+0 million Americans. The results show that people who sleep for 7-8 hours every night have the longest life expectancy, and the more people who sleep more or less than this average, the more likely they are to die early. If adults sleep less than 4 hours a day, their mortality rate is higher than that of those who sleep 7-8 hours a day 180%. Professor Kripke's conclusion is that moderate sleep is beneficial to prolong life. The research team led by Professor Klebkai in San Diego, USA, through the investigation of more than 1 10,000 people, they also found that if people around the age of 30 sleep less than 5 hours a day, their mortality rate is higher than that of people with normal sleep10%; For the elderly over 60 years old, too much sleep will also affect their life span. The relevant items will be introduced in detail and will not be repeated here. In fact, sleep has many positive effects on health, which is why the ancients "didn't look for a fairy to find a sleep prescription"