It is normal to have a slight swelling of the knee, which does not hinder exercise!
Specific exercise method: 1, sit by the bed, slowly straighten the calf from flexion, and tie a 5- 10 kg sandbag at the ankle. This method is mainly to exercise the strength of quadriceps! There is no time limit, practice as much as possible every day. 2. Stand by the bedside or tree, hold the bedside railing or tree, and squat hard, at least 100 times in a row, at least 3 groups a day. This exercise is mainly about bending your knees.