The main causes of X-leg are rickets in children and congenital inheritance of parents, and a few are sequelae caused by cartilage development disorder, trauma and fracture. Because the change of the force line of the lower limbs can easily lead to knee osteoarthritis, correcting this leg shape can not only improve the fitness, but also improve the stress imbalance of the knee joint. We should start with living habits, and at the same time, from the aspect of adjustment, all aspects are very important, so the first thing to understand is the problem of living habits. Many people are used to sitting with their feet apart and their knees inward. X-leg is also called genu valgus, which is an abnormal posture in which the knees are close together but the ankles cannot be close together when the legs stand naturally. X-shaped legs are mostly formed the day after tomorrow, such as sitting on a duck; Stand with your feet apart and your knees together; Sitting posture, running posture, squat, etc. A vicious circle will be formed by using the knee buckle.

Because of incorrect standing posture and walking posture, the hip joint is unstable, leading to internal rotation or external rotation of the thigh and femur, resulting in muscle imbalance on both sides, or the sole of the foot is off center when landing. In the long run, X-shaped legs and O-shaped legs are formed. People with X-legs will have knee valgus for a long time, which will cause the main weight of the body to press on the outside of the knee joint, resulting in excessive friction and softening of the leg bones. In the long run, it will increase the chance of joint pain, which will affect the normal walking and range of activities. Correcting the X-shaped leg is not a simple matter, which requires high intensity, type and standard of exercise. If you exercise by yourself blindly, it will not only have no therapeutic effect, but may even aggravate the symptoms of X-leg. Therefore, it is suggested that patients must go to regular medical institutions for correction.

Due to valgus of the knee joint, the weight of the body is concentrated on the lateral articular surface of the knee joint, the force line of the lower limbs is poor, and the friction between the patella and the femur is increased, which easily leads to patella softening. Excessive pressure and friction will lead to the wear of the lateral cartilage surface of the knee joint, the collapse of the tibial plateau, and secondary osteoarthritis.