After a busy day at work, forcing oneself to run 5 kilometers is not self-discipline, but overdrawing one's health. "Liu Jian, director of the Department of Cardiovascular Medicine at Peking University People's Hospital, believes that when the body is tired, the sympathetic nervous system is overly excited, and the heart rate and blood pressure are already at relatively high levels. Engaging in moderate to high-intensity exercise such as running at this time will further stimulate the sympathetic nervous system, leading to an increase in heart rate and a sudden increase in myocardial oxygen consumption. However, in a state of fatigue, the myocardial blood supply and oxygen supply ability decrease, forming a contradiction between the two, which may cause problems such as myocardial ischemia and arrhythmia. If there are underlying cardiovascular diseases, such as hypertrophic cardiomyopathy and congenital heart disease in young people, or coronary heart disease in middle-aged and elderly people, the risk of sudden death during vigorous exercise will significantly increase. Regular and moderate exercise can significantly reduce the risk of cardiovascular disease. ”Liu Jian said that office workers can consider having some "exercise snacks", which break down their daily physical activities into multiple short and easy to implement fragmented exercise plans. For example, doing exercises such as stretching and squats during work breaks, taking a nap or walking, climbing stairs, etc. after work. Wang Jianquan, director of the Department of Sports Medicine at Peking University Third Hospital, believes that it is necessary to adjust the intensity of exercise appropriately according to an individual's tolerance, and moderate exercise is scientific. Proper preparation activities should be done before exercising, paying attention to the sports field and environmental factors; When exercising, pay attention to the principle of gradual progress and avoid being too greedy; After exercise, it is important to do good stretching exercises to relax muscles and joints. As spring gradually warms up, all things in nature grow, and the human body is prone to "spring fatigue", mainly manifested as drowsiness, fatigue, and lack of energy. Liu Qingquan, the director of Beijing Traditional Chinese Medicine Hospital affiliated with Capital Medical University, suggested that the overall principle of spring exercise is mild and moderate, with "slight sweating and no fatigue" as the degree. You can choose according to your physical condition, such as riding a bicycle slowly in a good environment, moving your limbs, and relaxing your body and mind; Practice one or two sets of Tai Chi based on physical strength to exercise muscles and stabilize mood. (New Society)