Phase I: For patients with chondromalacia patellae, the first step is to find out if there is fluid in the knee joint. If there is effusion in the knee joint, it should first undergo a three-week effusion elimination treatment with physical therapy and medications such as diclofenac. Note that during the three-week effusion elimination treatment, it is important to reduce activity. If activity is not reduced enough, the effusion may not subside satisfactorily after three weeks by simply taking oral medications such as fotarolimus. If there is no effusion in the joint you can proceed directly to the second phase of medication below. Phase II: This phase of treatment is not started until the effusion has been effectively eliminated after three weeks, i.e., five weeks of oral glucosamine sulfate medication, and intra-articular injections of sodium hyaluronate, one injection per week, may be given for five weeks. This is generally known by the local orthopedic surgeon. However, if the intra-articular effusion does not subside, it can affect the effectiveness of both medications. Phase 3: After the second phase of the five-week drug treatment is completed, then follow the method on this website to perform the “static quadriceps exercise method” to thicken the thighs, not only to restore the previous activities, but also to reduce future recurrence. Specific exercises are as follows: 1, squatting horse stance: the purpose is to practice the strength of most muscle groups of the quadriceps. The posture is the same as in Chinese martial arts, horse riding squatting crotch action or called standing pile action, squatting horse stance. The patient’s legs apart, the distance between the two feet is slightly wider than the shoulders, the body to maintain an upright position, can not lean forward, then the knees began to bend squat, the two toes of the direction of random can. 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, good thigh muscle strength, squatting angle can reach 80 ° flexion, if the patient is weak, weak thigh muscle strength, both knees can be lightly flexed, this time the half squat position is higher, the patient more effort, can be later with the exercise, thigh muscle strength increases, and then increase the angle of the knee flexion. If the practice of squatting horse stance when the knee joint does not feel pain is best, but some patients may have a painful angle when squatting, some squatting to 30 ° pain, some squatting to 60 °, or 40 ° pain. For those who will have painful angles when squatting the horse stance, it is best to avoid the painful angles when practicing. If squatting to 30° hurts, you can continue squatting down to 60° to avoid the 30° painful angle, and vice versa. If there is pain in any of the angles, the exercise should still be performed, just find yourself the least painful angle to practice. Because it is a static exercise, even if there is some pain, the wear and tear on the joints is minimal. The duration of a squat varies greatly from person to person, and is squatting until you can’t hold on. Rest for one minute between squats, and don’t rest too long. Then practice the second squat, and so on, for 30 consecutive minutes for the total time of a squat exercise that day, but some patients can consider the first week of practice, the total time of each exercise from 10 minutes, practice two to three weeks before the total time of each exercise will increase to 30 minutes, to avoid the beginning of the exercise, the knee will practice swelling or even pain. The number of exercises per day should also be decided according to your physical condition, 1-3 times per day is good. At the beginning, you can practice 1 time a day, each exercise for a total time of 10 minutes; later leg strength has grown significantly, their own muscles and joints adapt, and then increase to 3 times a day, each exercise for a total time of 30 minutes. 2, specialized quadriceps medial head exercises: knee joint in any position between 0 ° – 20 ° stationary, ankle joint hanging weights resistance exercises: the purpose is to practice in the squatting horse stance exercise is not easy to practice the quadriceps medial head (that is, the quadriceps most medial part of the muscle). The method is to sit on the edge of the bed with weights on the feet, the knee joint first completely straight, at this time the knee joint is at 0 °, and then slowly bend the knee to bend the knee 20 °, and then slowly straighten to 0 °, which is the concept of 0 ° – 20 °. Repeat this several times to find an angle that does not hurt between 0°-20°, stay still, and resist the weight hanging from the ankle joint. Guidance can not hold on before resting for half a minute to a minute. The weight hanging at the ankle joint should be able to hold on for 3-5 minutes at an angle of 0°-20° at a time. If it is too light, no feeling for 10 minutes of activity, or too heavy to hold for 1 minute, it will not make the exercise satisfactory. Each time a certain angle of resistance exercises plus rest in between, the total time of all should be about 20 minutes – 30 minutes. 3, assessment method: If your knee joint in bending the knee about 80 ° squatting horse stance duration can last 20 minutes in one breath, it means that your muscle strength is enough. 20 minutes of the standard from my teacher in the sports team to figure out, try not to casually lower the requirements. Otherwise the muscle strength is not enough to achieve the rehabilitation effect.