Exercise makes people happy. Why? Many people feel this way. After the exercise, they are full of energy, their troubles are swept away, their horizons are broad, their thinking is clear, and their whole person is completely new. Why? A recent study in the United States reveals that exercise not only makes people healthy, but also benefits their mental health. There is a VGF gene movement in the brain, which can not only stimulate the vitality of all parts of the body, but also make people feel happy, thus effectively fighting depression. Doctors often encourage patients with depression to take proper exercise during treatment. However, why can exercise fight depression? The scientific community has been unable to uncover the mystery of this problem. Recently, researchers at Yale University discovered the principle behind exercise-induced depression. It turns out that this is due to a gene called VGF in the brain. By comparing the brains of exercise mice and static mice, the researchers found that a gene called VGF was particularly active in the brains of exercise mice, but not in the brains of non-exercise mice. The researchers further found that when VGF works, it will produce a strong antidepressant response in the brain of mice. However, artificial mutation or deletion of VGF gene in mouse brain neurons will have the opposite effect. This study provides direct evidence for revealing the principle of exercise anti-depression. According to sports medicine experts from Beijing Sport University, the discovery of VGF gene has a history of 10 years, which proves for the first time that it is directly related to depression, thus providing the possibility for gene regulation and gene diagnosis of depression. The genes of a species are unchanged, but they will still be influenced by the external environment. Exercise is an external positive regulator, and exercise can make VGF gene more active. Endorphins contribute a lot. Many people may have had this experience: if you are in a bad mood, running around the playground will change your mood. Is this an accident? Mahlman, an American psychologist, studied this phenomenon and found that after exercise, people's anxiety and depression levels decreased significantly, while their pleasure levels increased significantly, which is called the short-term emotional effect of physical exercise. Compared with this short-term effect, people who take part in exercise for a long time have significant differences in happiness compared with those who do not take part in exercise or insist on taking part in exercise. Why is this happening? Neurologists say that exercise makes people relax and exercise makes people happy. From the psychological point of view, exercise has a good regulating effect on people's emotions. In the process of exercise, a lot of individual energy is vented in a reasonable way, so the energy allocated to negative emotions is relatively small. Exercise itself can promote the endocrine changes of the human body. After exercise, the brain produces a substance called endorphin. The mood of people is related to the amount of endorphins secreted by the brain. Exercise can stimulate the secretion of endorphins and increase the secretion of endorphins. Stimulated by endorphins, people's body and mind are in a relaxed and happy state. Endorphins, also known as "happy hormones" or "young hormones", can make people feel happy and satisfied, and even help people relieve stress and unhappiness. Not all sports can produce this effect. The secretion of endorphins requires a certain intensity of exercise and a certain time to make it secrete. Now it is generally believed that moderate and high-intensity sports, such as aerobics, running, mountain climbing, badminton and so on. Can stimulate the secretion of endorphins for more than 30 minutes. Walking slowly can't achieve the above effect, but walking can divert people's attention, relieve depression or tension, and achieve the effect of relieving depression. Endorphins have a similar effect to morphine, which makes people feel particularly comfortable and happy, so exercise can also be addictive. People enjoy a comfortable and relaxed state after exercise. If they don't exercise for a while, they will feel uncomfortable all over. But sports addiction is different from drug addiction, and it is a relatively healthy addiction. According to statistics, about 10% people in the world suffer from depression, and15 people will suffer from depression at some stage of their lives. According to the annual report released by the World Health Organization not long ago, depression has now ranked the fourth among the top ten diseases in the world. It is predicted that by 2020, it will jump to the second place, ahead of cancer after myocardial infarction. Experts pointed out that from a medical point of view, if endorphins in the human body decrease, people will have painful experiences, lack of pleasure and produce depression. Exercise can promote the secretion of endorphins, which can relieve pain and relax nerves; Exercise can also promote the secretion of serotonin and norepinephrine, and can relieve physical discomfort, mental retardation and depression. Therefore, for patients with depression or anxiety, we often advise them to exercise moderately while giving targeted drugs and psychotherapy. Psychologists in university of north dakota, USA believe that people's brains turn faster when they look up. Therefore, when people are pessimistic, if they look up, they will not think so pessimistic; But if you keep your head down, you will think more pessimistically. Therefore, playing badminton and tennis is a good way to eliminate depression. Walking makes people healthy, climbing mountains makes people open, and swimming makes people stretch. The exercise summarized by our ancestors in getting along with nature is to make us live healthier and happier.