Passive exercises 1. CPM-assisted exercises: CPM-assisted exercises for knee flexion and extension, from small to large angles, progressively. 2. Extension-assisted exercises: Extension exercises are very important for those who have knee flexion contractures. The heel can be padded up and the gravity of the lower extremity can be used to help straighten the knee joint. Apply auxiliary pressure if necessary. Weight-bearing and walking exercises: 1. Weight-bearing walking: The duration of weight-bearing varies after different surgeries. Most knee arthroscopies allow early weight bearing after surgery. For special surgeries such as meniscal sutures and subchondral bone drilling, you may not be able to bear weight for a short period of time or not at all, so you will need to use an abductor or walker. Gradually increase the weight-bearing until normal. 2, half squat exercise: hold a sturdy chair or bed frame, feet from the chair or bed frame about 20 cm. Slowly bend the knee joint down squat. Do not squat completely, and not more than 90 degrees. Hold for 5-10 seconds, slowly stand up straight and relax. Repeat 10 times. 3, proprioceptive recovery exercises: for normal weight-bearing, but walking less imbalanced, mostly due to poor recovery of proprioception, may also be due to muscle strength imbalance caused. Cross gait walking can be performed to practice balance. It is best to start under the protection of an assistant to avoid falls.