Running can exercise cardiopulmonary function, enhance muscle strength, and continuous and effective jogging can also play the role of energy consumption and fat reduction. One member, aged 30 to 80, jogged regularly, and 86 men and women who did not usually like sports. Finally, it was found that the bone density of vertebrae, femoral joint, leg bone and arm joint of joggers was about 40% higher than that of non-joggers. For men, the longer they jog in a week, the higher their bone density. As for women, skeletal density is directly related to the length of jogging history. Only those who persevere in jogging can achieve the same effect as young people's bone density. Physiologists suggest that jogging in the morning can cause a lot of stress on the heart, because the heart usually fails to adapt to complete exercise in the early morning. Jogging can stimulate the body's endocrine hormones, making the heart beat faster. When jogging in the morning, people's adrenaline secretion is two to four times higher than in the afternoon or evening. Experts believe that jogging in the morning may cause blood clots and promote heart failure, while jogging at night may reduce the tendency of blood clots and prevent heart failure. Running is simple, but if the posture is incorrect, not only can not achieve the ideal fitness effect, but also may bring harm to the body. When running, leg movements should be relaxed. When one leg is pushed back, the other leg bends its knees and swings forward. The calf relaxes naturally. The hip is pushed forward and upward by the forward swing of the thigh. Landing on the heel first, and then quickly transition to full-foot landing. It is easy to cause tibial periostitis if you can't run on the ground with all the soles of your feet. In addition, it is important to swing your arms naturally when running. Correct arm posture can maintain body balance and coordinate stride frequency. Shoulder should be relaxed when swinging arms. Each arm bends to about 90 degrees. Two hands half clench fists, natural swing, slightly inward in front swing, slightly outward in back swing.