After the fracture, as the lower limb is prohibited to do weight-bearing exercise, it will lead to the disuse muscle atrophy of the lower limb, which is a normal physiological phenomenon, and it is completely possible to restore the muscle circumference through appropriate physical exercise, but it is necessary to start muscle exercise in the early stage. If the fracture is treated surgically, you can do muscle weight-bearing exercises at an early stage, but do not allow weight-bearing at the fracture end. After the fracture heals for a period of time and the strength increases, you can do partial weight-bearing exercises of the limb, especially to increase the muscle strength training. When the fracture is completely healed, the leg will generally become thinner, and after six months to two years of exercise, it can be completely restored to normal thickness.