Muscle of human body is composed of muscle fibers, and the number of muscle fibers in a muscle is certain. Physical exercise can thicken the dimension of muscle fibers, thus increasing the cross-sectional area of muscles, rather than increasing the number of muscle fibers. \ x0d \ x0d \ understand the above truth. Since the number of muscle fibers remains the same, we can make the calf muscles thinner in three ways: \x0d\\x0d\ First, we can make the dimensions of muscle fibers thinner by stretching muscles. The specific methods are: before sitting (standing), put your legs high and hook your legs at the same time; \ x0d \ x0d \ Second, you can use aerobic exercise to consume subcutaneous fat and muscle fiber fat of the calf, and you can also make the calf thinner; \ x0d \ x0d \ Third, lie still and don't use the muscles of your calf. After a long time, muscles will shrink, which is obviously not possible. \x0d\\x0d\ So the first two methods are more feasible, and the second exercise has the most obvious effect. This is also the reason why long-distance runners have thin legs.