Patients should pay attention to the protection of the knee joint when exercising to avoid injury. Patients should be instructed to reduce the weight of the knee joint and not to exercise in wet and cold environments to avoid catching cold in the knee joint. Before exercise, warm-up preparations should be done to improve the toughness and elasticity of the knee muscles, and after exercise, static stretching should be done to accelerate the metabolism of lactic acid in the local muscles, which can prevent knee injuries. Patients can also be told to take a hot bath in time after exercise and replenish carbohydrates, which can maintain the ionic balance in the body and also effectively protect the knee joint.