(1) Try to avoid large-scale exercise, such as running, high jump and long jump, and walk in the room for half an hour.
(2) Persist in actively contracting the quadriceps femoris (the muscle in the front thigh), 4-5 times a day, 10-20 times each time.
(3) Lie on your back, bend your knees and hips, and do bicycle-like movements, 2-3 times a day, 50 times each time.
(4) Don't do 30-50 squats and standing exercises, 2-3 times a day.
(5) Don't do semi-flexion rotation of the knee joint to prevent meniscus injury.