After the replacement of femoral head necrosis, if the patient recovers well, he or she can walk normally, but is not suitable for strenuous sports, such as running, to avoid accelerated wear of the artificial joint. Femoral head necrosis is a pathological evolution process that occurs initially in the weight-bearing area of the femoral head, and is currently most clinically used in artificial replacement surgery, where the necrotic femoral head is removed and replaced with a set of artificial joint prosthesis. After the replacement of the femoral head, in the first three months, the activity will be relatively limited and the patient cannot be asked to move like a normal person at this time. After three months or even six months, the patient can gradually achieve the same level of convenience as a normal person by performing appropriate muscle strength training, including some walking exercises and range of motion exercises, as ordered by the doctor. The success rate of joint replacement is influenced by many factors, but under normal circumstances, the success rate can reach more than 95% within one year of joint replacement.