The normal activities of cells in human tissues and organs are inseparable from energy, such as brain thinking, heart beating, nutrient transport, waste excretion, body temperature maintenance, muscle contraction, nerve impulse conduction and other physiological activities all need energy. These energies are metabolized and transformed by the chemical energy contained in food in the body. When people are awake during the day, nerve cells are excited and consume various nutrients in their own cells. During sleep, the body's anabolism is strengthened, so the energy consumed by various tissues is supplemented to reserve energy for the next day's study, work and labor. This is the normal activity process of nerve cells "excitation-inhibition-excitation". Only in this way can the nerve cells in the cerebral cortex be protected from failure and injury. Therefore, sleep is not only a process of passive rest, but also a process of energy synthesis and storage of tissues and cells in various systems of the body. In addition, a series of physiological activities should be carried out during sleep. For example, the synthesis of protein in the body continues, and the growth hormone and thyrotropin secreted by the pituitary gland increase. At the same time, the brain quietly summarizes, sorts out and stores the work and knowledge learned during the day, and even continues to think about the problems considered during the day. After enough sleep, people will become energetic, quick-thinking and radiant.
Why do people sleep? It is because there is a substance called "uridine" in the human body. When it accumulates to a certain extent in the hypothalamus of brain stem, people have the requirement of sleep. Sleep is too important for human beings. It can be said that under certain conditions, sleep is more precious to life and health than eating. According to experiments, people can go without food for a month or more, but they can't live without sleep for 10- 14 days. Therefore, sleep is necessary for life, and lack of sleep is more likely to cause death than hunger. Recent studies have found that the death rate of people who sleep less than 4 hours a day is higher than that of people who sleep 7-8 hours 1 times. Long-term insomnia will accelerate the aging and death of nerve cells. Therefore, regular and adequate sleep is an important guarantee for health and longevity.
Studies have shown that long-term lack of sleep will reduce people's cognitive ability, poor orientation, slow response, poor language ability, and even lead to decreased immune function, leading to colds, depression, insanity, diabetes, obesity, stroke, cardiovascular and cerebrovascular diseases. The possibility of aging symptoms is also significantly greater than that of normal people. In addition, due to lack of sleep, according to incomplete statistics, tens of thousands of people in China die indirectly due to sleep disorders every year. Adequate sleep can relax tired and nervous organs, return to normal and restore vitality. Many chronic diseases or acute diseases need adequate sleep to improve symptoms and promote health. Such as hypertension, cervical spondylosis and neurosis. It needs to be promoted by sleeping well and assisting other treatments. The research team led by Professor Berridabi, an immunologist at the University of Florida, USA, conducted a series of studies on the relationship between sleep, hypnosis and human immunity. The conclusion is that sleep can not only eliminate fatigue and make people have new vitality, but also has a close relationship with improving immunity and strengthening disease resistance. A sleep study published by the University of Chicago in The Lancet magazine shows that sleep is closely related to endocrine. The blood sugar level of young subjects who slept for 4 hours every day for a week increased, which may be due to the fact that lack of sleep made the central nervous system active, inhibited pancreatic function and reduced insulin secretion. Researchers speculate that lack of sleep may be one of the reasons for the increase in diabetes in recent years.
Sleep time is related to coronary heart disease. A Canadian study on whether reducing sleep time is related to the increased risk of coronary heart disease shows that long-term lack of sleep will have adverse consequences for health. This study included 7 16 17 professional women (45-65 years old) in American health system who had no coronary heart disease. In 1986, the researchers asked them about their sleep time every day by mail questionnaire, and followed them to 1996 to understand the occurrence of coronary heart disease-related events. The researchers evaluated the relationship between self-reported sleep time and the incidence of coronary heart disease. The results showed that during the follow-up period of 10 year, there were 934 coronary heart disease events (fatal 27 1, nonfatal 663). Conclusion Short sleep time is an independent risk factor for increasing the incidence of coronary heart disease.
Adequate sleep can also prevent cancer. Australian experts recently pointed out that the climax of human cell division is after falling asleep at night. If you don't sleep well, it is difficult for the human body to control cells to mutate during division and become cancer cells. Ensuring a good sleep is an important measure to prevent cancer.