It usually takes 1-3 months to exercise after a broken foot, the details are as follows: First, after a mildly broken foot, the patient only has local swelling and pain, and the ligaments will be strained, at this time, transient braking and rest are needed, and the symptoms will be gradually reduced. But also need a period of rehabilitation training to restore the stability of the ankle joint, so in about a month can resume sports. Secondly, for more serious ankle sprains, it usually requires brace or cast fixation, and the pain symptoms can be recovered in about six weeks, and the external fixation can be removed. At this time, rehabilitation training can be started. After rehabilitation training, the stability of the ankle joint can be restored. Generally, in about three months, the patient can participate in appropriate sports. Through the above analysis, we can understand that after ankle sprain, not only do we need to brake and other treatment, but also need to carry out rehabilitation training, and we must wait for the rehabilitation training to produce better results before we can carry out sports.