In order to achieve the ideal fitness effect, we must insist on exercising at the same time, for example, at 9 o'clock every morning, so that the human body can form a law (the formation of the exercise biological clock), just like forming a life law. Every morning from 9: 00 to 9: 00, the human body can automatically adjust itself, from a quiet state to a state of exercise, and it is not easy to get tired during the exercise, which can achieve the purpose of fitness exercise.

If you exercise, it is better to exercise from 3 pm to 9 pm. Because after a day's work activities, the blood circulation is improved and accelerated, the muscle viscosity is reduced, the tension is increased, the excitability is increased, and the range of joint activity is large. Besides, this time is the peak of physical strength, full of energy and enhanced sports ability, which is indeed a good time for fitness exercise. Studies have proved that the central nervous system of human movement is the most active from 3 pm to 9 pm, and the excitability is stronger than inhibition. During this period, many world records were broken.