Patellar cartilage wear exercise does not exist in the absolute best way to exercise, its main purpose is to enhance the muscle strength of the knee joint and mobility, etc., the method of static squatting training, quadriceps contraction training. 1. Static squatting training: back against the wall, separate feet, and shoulder width. Bend the knees, gradually squat, pay attention to the calf and thigh angle should not be less than 90 degrees, so as not to aggravate the wear and tear of the patella. In the squatting process, try to divide into three angles from large to small, in each angle to adhere to a period of time and then slowly return to the upright position, for simple relaxation. 2. Quadriceps contraction training: take the supine position or sitting position, straighten the lower limbs, tense the quadriceps, stay for a few seconds after relaxation. Regular adherence to this exercise can help exercise the contraction force of quadriceps muscle, stabilize the knee joint and promote the recovery of local cartilage. The above exercises should be performed under professional guidance to avoid unnecessary injuries. In addition, if you feel obvious limitation of activity or pain, you should rest with braking and avoid aggravating your condition by inappropriate exercise. If there is any discomfort, please consult the doctor at any time.