If you feel sore, take a break and analyze whether there is anything wrong with your fitness plan. Generally, it is enough for each muscle group to exercise once a week (except for the abdomen). Exercise only one part at a time, such as chest, arms, shoulders, legs and back, so that one cycle a week will give muscles enough rest time. Generally, muscles will not grow out immediately after exercise, and only after nutrition supplement and rest will they have obvious effects. Therefore, if the number of exercises is too frequent, the muscles will always be in the consumption stage and cannot grow.