0-1 week (a) On the day of surgery: 1 , Ankle pump – forceful, slow, full range flexion and extension of the ankle joint, 5 minutes/set, 1 set/hour. 2 . Quadriceps isometric exercises – i.e. thigh muscle tensing and relaxation. Should be done as much as possible without increasing pain. 3, N rope muscle isometric exercises – the affected leg force down the pillow, so that the posterior thigh muscle tensing and relaxation. Do all exercises as much as possible without increasing pain! 4 After 24 hours after surgery, you can walk on the ground with the help of crutches, but only to go to the toilet and other necessary activities. (ii) 1 day after surgery: 1. Continue ankle pump exercises. 2.Start straight leg raising – extend the knee and then raise the leg straight up to the heel 15M away from the bed, hold for 5 seconds. 30 times/group, 3-4 groups/day. 3.Start lateral leg raising exercises, requirements and times as above. 4, start the back leg raising exercises, prone (face down on the floor), straight leg raising after knee extension to the toes of the foot away from the bed at 5M, hold for 5 seconds. Requirements and times as above. 5, weight-bearing and balance – under the protection of the feet separation, in the range of micro-pain alternating left and right to move the center of gravity. 5 minutes / times, 2 times / day. -Both feet separated anteriorly and posteriorly, move the center of gravity. If the pain and swelling are not obvious, you can go down to the ground with a single crutch, or without crutches, but more walking is not encouraged. (iii) 3 days after operation Continue the above exercises. Begin flexion exercises, sitting (or supine) position leg drop: sit on the edge of the bed, hanging below the knee outside the bed. Relax the thigh muscles under protection and let the calf hang down naturally, to the limit of protection for 10 minutes. If necessary, load at the ankle joint. To the extent that it is slightly painful, reach the widest possible angle. (iv) 4 days after operation: 1. Continue the above exercises. Start one-legged standing balance exercise. 5 minutes/time, 2-3 times/day. 2. Start prone position “hook leg exercise”, 30 times/set, 2-4 sets/day. Take the sandbag as the load, within 0-45 degrees of flexion and extension, if the joint is swollen and painful after the exercise, immediately apply ice packs. 3. Active knee flexion up to 90 degrees. (v) 5 days after surgery: 1 Continue and strengthen the above exercises. Start the active extension and flexion exercises within the range of 0-45 degrees with weight in the standing position, but without leaning against the wall. 30 times/day. However, do not lean against the wall. 30 times/group, 2-3 groups/day, ice packs for swelling and pain after the exercises. (F) 1 week after surgery: 1, active flexion greater than 90 °. 2, can stand on one foot, and then the other foot can stand on the other foot, and then the other foot can stand on the other foot. 2, can stand on one foot, can walk short distance without crutches. Start squatting against the wall. Static squatting exercises: back against the wall, feet shoulder width apart, toes and knee joints forward, no “inside and outside eights”, gradually increase the angle of squatting with the increase in strength (less than 90 °), 2 minutes / times, interval of 5 seconds, 5-10 consecutive / group. 2-3 groups / day. 4, start standing “hook leg” exercise. Resist flexion to a pain-free maximum angle for 10-15 seconds. 30 repetitions/set, 4 sets/day. 2 weeks – 1 month (a) 2 weeks after surgery: 1. Active flexion to 120-130°. Strengthening plyometric exercises. (One straight leg lift can be up to 6 minutes) 2. If there is no obvious swelling or pain in the joint, then you should walk with a normal gait as much as possible. 3, start to guide the various muscle strength exercises: the load, angle, number of exercises and time, according to their own conditions. Generally 30 times/group, 2-4 groups/day. (ii) 3 weeks after surgery: 1. Passive flexion to 140°. Strengthen muscle strength exercises. 2. Start anterior-posterior and lateral stride exercises. 30 repetitions/set, 4 sets/day. 1 month-2 months (a) 5 weeks after surgery: 1. Active flexion up to 150° (full range, same as the healthy leg), and basically painless. 2.Start half squatting exercise with the affected side single leg in 45° position. 5 minutes/times, 4 times/day. Start stationary bicycle exercise. 30 minutes/times, 2 times/day. (ii) 6-8 weeks after surgery: 1. The active flexion and extension angle reaches the same as that of the healthy side, and there is no pain. 2. 2.Can complete daily activities, such as going up and down stairs, riding a bicycle, walking more than 5000 meters without swelling and pain in the joints. 3.Start kneeling practice. 4.Start pedaling exercises. 5.Start swimming, jumping rope and jogging. 2 months – 3 months 1, start the knee ring exercise. 2.Start jumping up and down exercises. 3.Start lateral jumping exercises. 4. Athletes begin to practice basic movements in specialized sports. Knee pads can be worn for protection if necessary, but are only advocated for use during strenuous exercise. After 3 months 1, gradually resume strenuous activities, or special training. Strengthen the muscle strength and the stability of the joints during running and jumping. 2, through the test, the affected muscle strength reaches more than 85% of the healthy side, there is no pain in exercise, no obvious swelling, then you can fully resume sports.