This question is rather general. Generally speaking, normal fitness will make calf muscles tense and enhance endurance, but it will not make calf muscles overdeveloped. Generally, there are two kinds of people who have this question. One is that girls' running and jumping will make their calves thicker, and the other is that men with thick calves are afraid of getting thicker because of exercise. The following is a simple explanation for these two types of people:

1, calf muscle group is a special muscle group with many muscle fibers and strong endurance. As long as it is not targeted special training, there will be no obvious change in calf circumference. Many girls feel that their calves swell after daily exercise, which leads to the sensory illusion that their calves become thicker. In fact, don't worry, because it is caused by congestion of calf muscles after exercise. As long as you fully stretch and rest after exercise, you won't thicken your calves. Moreover, exercise consumes excess body fat, tightens calf muscles and has better leg lines. So rest assured, there will be no problem with exercise.

2. For people born with large calf circumference (excluding obesity factors), exercise may not effectively reduce calf circumference, because heredity plays a strong role, so don't care too much about calf thickness. A more feasible way is to increase the thigh circumference and upper body muscle circumference through exercise, so that the proportion of the whole body is more coordinated, so that the calf thickness will not become a factor affecting the appearance of the body.