Calcium deficiency and genetics are the two foundations for the formation of O-shaped legs, but the more direct reason lies in walking, standing, sitting and some exercises. Walking with splayed feet, standing in a resting position, wearing high heels for a long time, sitting cross-legged, kneeling, squatting, etc., will exert outward force on the knee joint, and this force will pull the lateral collateral ligament of the knee joint for a long time. , which will lead to laxity of the lateral collateral ligament of the knee joint.
Extended information:
1. Pathogenesis
Calcium deficiency and genetics are the two basis for the formation of O-shaped legs, but the more direct reason is still Walking, standing, sitting and some exercises. Walking with splayed legs, standing in a resting position, wearing high heels for a long time, sitting cross-legged, kneeling, squatting, etc.
The medial and lateral collateral ligaments of the knee joint are structures that stabilize the medial and lateral angles of the knee joint. When the lateral collateral ligament is loose, the greater force of the medial collateral ligament will pull the tibia of the calf to rotate medially, causing knee varum.
2. Disease hazards
In a normal knee joint, the pressure is evenly distributed on the joint surface. For people with O-shaped legs, due to the varus of the knee joint, too much body weight is concentrated on the inner joint surface of the knee joint. Excessive pressure and friction can cause wear and tear on the medial cartilage surface of the knee joint, collapse of the tibial platform, and secondary osteoarthritis. As you get older, joint pain is more likely to occur, affecting normal walking activities.
Baidu Encyclopedia-O-shaped legs