Many foreign studies show that the ability and state of the body change overnight. Every day from 8: 00 to 12, from 14 to 17, muscle speed, strength and endurance are in the best condition. If you do physical exercise and sports training during this time, the effect will be better. Whether in the morning or afternoon, you should exercise moderately. Needs vary from person to person, step by step. Don't be too strenuous at first, and then gradually increase the amount of exercise. Jogging is good, but it's best not to be less than half an hour.