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. \x0d\ Why does this phenomenon exist? Min Baoquan, deputy chief physician of the Department of Neurology of xuanwu hospital, said: "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 large amount of individual energy is vented in a reasonable way, so the energy allocated to negative emotions is relatively small. " Professor Jiao Wei pointed out that exercise itself can promote the changes of human endocrine. After exercise, the brain will produce a substance called endorphin, and people's mood is related to the amount of endorphin 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. \x0d\ Professor Jiao Wei also pointed out that not all sports can produce this effect, and the secretion of endorphins needs a certain intensity and time to make it secrete. Now it is generally believed that moderate and high-intensity sports, such as aerobics, running, mountaineering, 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. \x0d\ Endorphins have a similar effect to morphine, which can make people feel particularly comfortable and happy, so exercise can also make people addicted. 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. \x0d\ Exercise can resist depression \x0d\ According to statistics, about 10% people in the world suffer from depression, and15 people will suffer from depression at some stage in 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. \x0d\ Min Baoquan 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. \x0d\ Brian Meyer, a psychologist in university of north dakota, USA, believes that when people look up, their brains will turn faster. 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. \x0d\ Walking makes us fit, mountaineering makes us open, swimming makes us stretch, and the exercises summarized by our ancestors in getting along with nature are all aimed at making us live healthier and happier. Move, because life lies in movement.