Does crossing your legs damage the knee joint?

Leg crossing generally does not damage the knee joint, but for individuals with existing knee conditions, long-term or frequent leg crossing may cause harm. The details are as follows:

Occasional leg crossing in healthy individuals does not directly lead to knee injury. The human skeletal system and joints possess a certain degree of adaptability and resilience, and short-term leg-crossing postures do not significantly affect the structure of the knee joint. As long as the posture is not maintained for prolonged periods and no noticeable discomfort occurs, occasional leg crossing is usually safe.

However, individuals with pre-existing knee conditions or those who frequently cross their legs over long periods may experience knee joint damage. Inflammation or disease can already be irritating the knee joint, and leg crossing may exacerbate this irritation. When crossing the legs, body positioning can compress the knee joint, increasing intra-articular pressure, impairing local circulation, and affecting blood supply to cartilage and surrounding soft tissues.

It is recommended to maintain healthy postures, balance activity with rest, and engage in appropriate exercise such as running or playing sports. If any discomfort arises, prompt medical consultation is advised.