There is no absolute sense of the best way to exercise for knee enlargement, attention should be paid to the muscle strength and mobility of the knee joint under the condition of avoiding weight bearing on the knee joint. Quadriceps training, straight leg raising training, knee flexion and extension training and some aerobic exercises can be carried out. 1. Quadriceps exercise: take a sitting position, straighten and flex the knee joint to exercise the quadriceps muscle strength. Straighten the knee as much as possible, hold it for about 10 seconds and then slowly put it down, repeat several times. 2. Straight leg elevation training: take the supine position, lower limbs taut and elevated, hold for about 10 seconds and then slowly put down, can be repeated several times. 3. Knee flexion and extension training: sitting position and supine position can be carried out. By flexing and extending the knee joint to maintain the angle of movement of the joint. 4. Aerobic exercise: you can choose aerobic exercise with less damage to the knee, such as swimming, yoga, indoor cycling and other exercises, which will not increase the burden on the joints while exercising the muscles. Exercise for knee enlargement should be carried out under the guidance of a professional physician, so as not to cause harm to the organism due to improper exercise.