The subject worries too much, and the body fat is covered on the muscles. If the subjects can practice chest muscles through strength training, such as various bench presses and flying birds, not only will the chest not become smaller, but it will increase. But if the subjects go to the gym just to lose weight and brush body fat, because brushing body fat will reduce fat evenly, and the chest will definitely become smaller. Therefore, personal suggestions are mainly combined with strength training to increase chest muscles in an anaerobic way, so as to achieve the effect of brushing fat without losing the chest.