From the point of view of exercise physiology, the frequency of exercise (that is, the number of exercises per week) is directly related to the effect of exercise. After moderate exercise, the fitness effect of muscles (such as muscle glycogen storage) and various organ systems of the whole body can be maintained for a certain period of time (from several hours to several days). For example, after exercise, the concentration of muscle glycogen gradually increased, reaching the highest point at the 24th hour, and then gradually decreased. Therefore, the most appropriate exercise frequency should be mastered in this way, that is, the second exercise should be carried out before the effect of the previous exercise has disappeared, so that the fitness effect of each exercise can be gradually accumulated to achieve the purpose of enhancing physical fitness and health. Otherwise, the interval between each exercise is too long, which destroys the continuity of exercise training, and it is difficult to achieve the proper fitness effect, and muscle soreness, fatigue and some sports injuries are easy to occur after each exercise.

For those who take part in sports for the first time, the frequency of exercise is low at the beginning, and it is more appropriate to take three times a week 15-30 minutes. In the future, with the development of the exercise process and the enhancement of physical fitness, you can exercise 3-5 times a week for 30-50 minutes each time.

When you do physical exercise with a certain intensity, quantity and duration (more than 30 minutes), you can do it 3-4 times a week, every other day 1 time. Studies have shown that 6-7 weeks of physical exercise through interval training can significantly improve the maximum oxygen uptake.

People who are in poor health, older or taking part in physical exercise for the first time can jog or run alternately, each time 15-30 minutes, and the frequency is 2-3 times a week. After several weeks or months, increase the frequency of exercise according to your physical condition. When increasing the frequency, I must consider my actual situation, such as age, physical condition, exercise time, reaction after exercise (such as heart rate, breathing times, muscle aches). Older, fatter and weaker people are prone to respiratory, circulatory and digestive system reactions and muscle aches, so they should be particularly cautious when increasing exercise frequency.

If the main purpose of your physical exercise is to eliminate excess fat and lose weight, then the effect of exercising five times a week is better than exercising three times, but the intensity of exercise should not be too great and the way of exercise should not be too intense. You can increase the body's calorie consumption by increasing the exercise frequency and prolonging the exercise time, so as to control your weight.