Long-term running causes the muscles of the calf gastrocnemius to become thicker, which is a normal phenomenon, and any exercise may cause the muscles to become firmer. In general, the muscle line of the calf does not affect the aesthetics of the patient, but if some girls feel that the muscle line is too thick to affect the aesthetics, then they can avoid running as an exercise. If the patient only wants to exercise the muscles of the upper part of the body as well as the chest and waist, the exercise can be done without running. If the patient wants to exercise the lower limb coordination and muscle strength, but at the same time does not want too much calf muscle growth, then you can change the way of exercise, such as yoga, playing tai chi, swimming, etc., which not only plays the role of exercise, but also avoids the growth of muscles.