Cross-legged sitting will affect the leg type. Long-term sitting cross-legged will not only make the knee cartilage, ligament deformation, but also affect the blood circulation of the lower limbs, oppression of the leg muscles, these factors will make the leg type of light or heavy changes. For young people, because their bones are still not completely shaped, sitting cross-legged on the lower limb bone development and the impact of leg type will be particularly obvious. For example, if a person sits cross-legged for a long time, he or she will gradually walk with his or her legs bowed out due to excessive stretching of the lateral collateral ligaments of the knee joints and injuries to the meniscus, which will significantly change the shape of his or her legs in the long run. Therefore, it is recommended to choose the correct sitting posture in daily life to avoid unnecessary damage and negative impact on the cartilage, ligament and leg shape of the lower limbs due to long-term bad sitting posture.