After fracture surgery, physicians require early activity to promote fracture healing and joint function recovery, but the timing of exercise and activity must be under the guidance of a physician, after the review of the X-ray to understand the fracture healing before deciding the degree of exercise activity, otherwise it will lead to internal fixation fracture, re-operation may. The reason is that the internal fixation can only hold the fracture together to facilitate the healing process, but it cannot bear the weight, similar to the way a steel bar can break after repeated bending, the metal fatigue fracture. Especially in some cases of comminuted fractures, the internal fixation such as the plate and intramedullary nail can break before the fracture heals, so do not think that you can move around freely because it is not painful.