When to start active exercise for a greater tuberosity fracture of the humerus is largely related to the condition and how well it has recovered. Patients with mild fractures can usually start exercising in about a month, while patients with serious conditions usually need more than three months. In the early stage of the fracture of the greater tuberosity of the humerus, it is necessary to brake and rest, and not to exercise too early, otherwise it is easy to produce the phenomenon of fracture displacement. 1. Mild fracture: If the fracture heals relatively well, just a slight bone crack, active treatment, usually about 1 month time can start active exercise. 2. Severe fracture: If the fracture of the greater tuberosity of the humerus is more serious, such as a comminuted fracture, it usually takes 3 months to start active exercise. If the fracture is poorly healed, the time for active exercise is longer and may take 4 to 5 months, depending on the doctor’s assessment. It is recommended that patients with humeral tuberosity fracture should seek timely medical treatment under the guidance of a specialized doctor, and should not exercise blindly to avoid adverse consequences.