Whether it is a large muscle group or a small muscle group, it is better to practice one or two muscles every day, which can stimulate more muscles and be targeted. If you practice all over the body, time and physical strength are not allowed, and it is not conducive to muscle recovery after exercise. If it is only a short period of full-body exercise, the muscles will not be effectively stimulated, and the effect will be greatly reduced, so it is not muscle training, but entertainment.