The patient’s legs are spread apart, the distance between the feet is slightly wider than the shoulders, and the body remains in an upright position without leaning forward, at which point the knees begin to bend and squat. The bending angle of both knees varies according to the patient’s physical condition and muscle strength. If the patient’s physical condition is good, thigh strength is good, squatting can reach 60 degrees of knee flexion, if the patient is weak, thigh muscle strength is weak, both knees can be lightly flexed, this time the half squat position is higher, the patient more effort, later with the exercise, thigh muscle strength increases, and then increase the angle of knee flexion. Each patient will have a painful angle when squatting, some squatting to 30 degrees pain, some squatting to 60 degrees, or 40 degrees pain, practice static squatting best to avoid the pain angle, if squatting to 30 degrees pain, you can continue to squat down to 60 degrees to avoid the 30 degree pain angle, and vice versa. The duration of a squat varies greatly from person to person, all squatting until they can’t hold on. Rest a minute between two squats, do not rest for too long. Then practice the second squat, and so on, for 30 minutes in a row for the day’s squat exercise. According to their own physical condition to determine the number of exercises, practice 1-3 times a day.