Man's life is like a long chain. Only by mastering the health science of each link and following the normal operation of life track can we form an interlocking, shining, exquisite and complete life chain and achieve the goal of health and longevity! How long is a person's natural life span? According to scientific investigation and calculation, there will be no diseases and accidents in one's life, and the natural maximum life span should be 120 ~ 170 years old. But so far, few people have really lived to a natural age and died without illness. However, the average life expectancy of human beings is gradually improved with the development of society and the progress of science. For example, in China, the average life expectancy of 1949 was 35 years, while that of 1987 was 69 years, and now it is 7 1 year. According to the census data of China, in the 1 census of 1953, there were 3,384 people aged over 0/00 in China. 1990 the fourth census showed that there were 6434 people in China. The oldest is 155, and there are 34 people who exceed 120. In the early 1950s, the average life expectancy of residents in many developing countries was only about 40 years old. From the late 1970s to the early 1980s, it has been extended to 50-60 years old. The above facts reflect that human life span is closely related to social development and scientific progress. With the gradual extension of human life, it is not impossible to reach the peak of 170 years old. To improve the natural life span of human beings. So far, there is no panacea, but strengthening self-care is the best way to prolong life. (1) Mental health cannot be ignored. As the saying goes, "Laugh for ten years, but worry once." Although it is a bit exaggerated, it has certain scientific truth. Modern medicine has proved that when people are happy, the functional activities of each system are in a stable, coordinated and harmonious state. When the mood is low, it causes the pulse breathing to accelerate, blood pressure to rise, gastrointestinal peristalsis to weaken, digestive function to decline, peripheral blood vessels to contract, hands and feet to get cold, and immune function to decline. Therefore, some people call optimism "an excellent health care doctor". It is said that more than 20 years ago, American writer Carson suffered from a disabling spinal disease. The doctor predicted that his chances of survival were only1100. Carson doesn't believe it. He decided to reward himself by reading humorous stories and watching funny movies. He found that laughter can relieve the pain, and the pain is greatly relieved once, and he can sleep comfortably for two hours. He insisted on this treatment and his condition gradually improved. A few years later, he miraculously recovered. According to scientists' survey of the long-lived elderly, 96% of the elderly call themselves optimists. Tolerance is also very important, and some people regard it as a "good prescription" for treating mental trauma. Tolerance can solve people's mental pain. When you forgive others, you heal your own mental trauma. In order to control anger, some people think it is an effective way to keep healthy. Chinese medicine believes that "anger hurts the liver", and many people have experienced anger. When angry, they will feel chest tightness, abdominal pain, loss of appetite, trembling and fatigue. Modern medical research has proved that anger makes people tachycardia, blood pressure increases and blood viscosity increases, which are all factors affecting health. Many middle-aged and elderly people, because anger induces angina pectoris or myocardial infarction or cerebral vascular rupture, seem that anger can really kill people. No wonder some people say that "people who laugh and laugh live longer, and people who worry too much live longer", which is the truth. (2) It is difficult to live a long life if the limbs are not diligent. Science has proved that physical exercise or labor exercise has anti-aging effect. There is a law in biology called "use is to advance, waste is to retreat". Because exercise increases the capillary flow in muscles, improves muscle nutrition supply, promotes cell metabolism, makes muscles strong and reduces bone calcium deficiency; Improve cardiovascular, pulmonary and gastrointestinal functions; Make the coordination and command of nervous system work more accurate; Improve fat metabolism, reduce blood fat content, reduce cholesterol deposition on arterial wall, and regulate blood pressure. Some scientists observed 8500 farm workers during the period of 10, and found that the prevalence of myocardial infarction in people who work sitting is three times higher than that in people who work standing. (3) Balanced nutrition is the guarantee. Throughout the ages, some people have pinned their hopes for health and longevity on panacea, or at least turned to nourishing drugs; Others build their health on the basis of daily life, keep an open-minded and optimistic spirit all their lives, eat ordinary nutrition, adhere to labor and physical exercise, live a regular life and indulge in sex. From the perspective of modern medicine, the latter method is correct. Take the emperors of past dynasties for example, most of them tonify their bodies and pray for a long life, but few of them really live a long life; On the contrary, the long-lived elderly mostly come from the working class and rarely take tonics. In ancient China, the health care experience of "five grains as nourishment, five fruits as help, five livestock as benefit and five vegetables as supplement" has been put forward. Generally speaking, it is necessary to maintain a diet structure with plant foods such as grain, beans, vegetables and fruits as the main food, supplemented by animal foods such as poultry, eggs, milk and fish, and achieve the goal of balanced nutrition through reasonable collocation of various foods. The material conditions in modern society are already quite superior, and the medical level is getting higher and higher. As long as personal health awareness and actions can keep up, everyone may break through the limit of natural life.