The reason why the legs do not close together, other than the normal physiological curve of the pelvis, is commonly found in the knee inversion, which is often referred to as “O-leg”.
In a normal anatomical state, the root of the thigh to the knee cannot be tightly closed due to the width of the pelvis, and there is a normal physiological curve. The reason for the abnormal, inability to close the knee is common in the inversion of the knee, which means that when the lower extremities are naturally straight or standing, the inner ankles of the two feet can touch each other, but the two knees cannot come together. Calcium deficiency and genetics are two basic factors that cause inversion of the knee, while the direct cause is improper walking, standing, sitting, and exercise, such as walking with outward-facing feet and wearing high heels for a long time.
If the degree of inversion is mild, the patient can correct the inversion by adjusting the walking posture, such as putting the center of gravity on the inside of the legs, tucking the abdomen and straightening the waist, and holding the body upright, as well as doing frequent clenching of the legs. If the inversion of the knee is severe, causing degeneration or tearing of the meniscus and severe cartilage wear, a series of surgeries will be required to correct the problem.