The advantage of grouping times of fitness movements is that it can stimulate muscles better, thus increasing the amount of training, accumulating the amount of training and controlling the exercise load. If a group goes all out to the end, it will lead to exhaustion and the muscles can't complete the second repetition. Therefore, high-intensity exercise is suitable for fitness aimed at strengthening strength and muscles. At this time, it will be safer and more time-saving to complete several groups of one action and then change the next one.