1 day-4 weeks postoperatively: (1) Postoperatively, the affected limb is bandaged with pressure and elevated. (2) Immediately after surgery, the affected limb should be immobilized in an adjustable knee brace in the straight position. (3) Weight bearing: If the injury is in the body of the meniscus, partial weight bearing is not started until 4 weeks after surgery, with one-third to one-half of the weight bearing. However, if the injury is in the anterior or posterior horn of the meniscus, weight bearing can be started as early as possible after surgery with the knee adjustable brace fixed in the extension position. Li Peng, Department of Orthopedics, Xiangyang Hospital of Traditional Chinese Medicine (4) Passive mobility of the knee joint: only passive knee flexion can be performed. 1 week after surgery, passive knee flexion to 90°, 2 weeks after surgery passive knee flexion to 100°, 3 weeks after surgery passive knee flexion to 110°, 4 weeks after surgery passive knee flexion to 120°. (5) Active knee mobility: Within 4 weeks postoperatively, active knee mobility should still be within 90° even though the passive knee mobility has reached 120° at 4 weeks postoperatively. (6) Within 4 weeks postoperatively, activities of impingement between the femur and tibia and movements that can cause knee shear should be avoided. (7) Muscle linkage: a. Isometric contraction exercises for the quadriceps (anterolateral thigh muscle group) – i.e. thigh muscle tensing and relaxation. Do as many as possible without increasing pain. (More than 500 times/day). b. Isometric contraction exercises for the N cord muscle (posterior thigh muscle group) – the affected leg presses down on the padded pillow to tense and relax the posterior thigh muscle. Requirements as above, greater than 500 reps/day. c. Ankle pump – forceful, slow, full range flexion and extension of the ankle joint, as much as possible. After getting off the ground, anti-gravity lower ankle pump exercises can be performed. Meniscal injuries often occur at the posterior horn of the meniscus and hyperflexion of the knee is to be avoided for 4-6 weeks postoperatively. 5-7 weeks postoperatively (1) In patients with a meniscal body injury, there is a gradual transition from partial to full weight bearing (six weeks postoperatively), during which time an elastic band may be used to assist with weight bearing. (2) Knee mobility exercises: continue the passive movement of the knee joint from 5 weeks to 7 weeks postoperatively, and maintain the passive movement angle at 120° at 4 weeks postoperatively. (3) Muscle strength exercises: In this period, continue to perform isometric contraction of quadriceps muscle, isometric contraction of N cord muscle and ankle pump exercises, and strengthen the exercises of flexion and extension of knee 0-30 degrees; then the exercises of half squat with 30° of knee flexion (i.e. squatting stance with 30° of knee flexion). After 8 weeks postoperatively: (1) The knee can be fully weight-bearing at 8 weeks postoperatively. (2) At 8 weeks postoperatively, the knee can be flexed beyond 120° and the athlete is able to associate the knee with flexion. (3) The athlete may begin training 3 months after surgery.