There are three main causes of X-leg, one is rickets in children, the other is congenital inheritance, and a small part is sequelae caused by flatfoot, cartilage dysplasia, trauma and fracture. This kind of leg deformity not only affects body shape and bodybuilding, but also has great influence on human health. Both genu valgus and genu varum destroy the normal stress distribution of the knee joint, which increases the stress on one side of the joint and decreases the stress on the opposite side. At the same time, the friction between patella and femur increases due to the change of force line of lower limbs. After a long time, walking will also cause knee pain, and the mobility of joints will also be affected, which will easily lead to knee osteoarthritis. For this kind of leg shape, X-O leg correction combined with Minster correction can not only improve the fitness, but also improve the stress imbalance of knee joint.
Etiology of O-leg: Calcium deficiency and heredity are the two foundations for the formation of O-leg, but the more direct reasons are walking posture, standing posture, sitting posture and some exercise. Walking with splayed feet, standing relaxed, wearing high heels, sitting in a dish and squatting for a long time will give the knee joint outward strength, which will pull the lateral collateral ligament of the knee joint, leading to the long-term relaxation of the lateral collateral ligament of the knee joint. The medial and lateral collateral ligament of knee joint is the stable structure of medial and lateral angle of knee joint. When the lateral collateral ligament is relaxed, the medial collateral ligament will pull the calf and tibia to rotate inward with excessive force, resulting in genu varus.