One of the reasons for the formation of X/O legs is the bending of bones. External force is used to correct the bending of bones and make the bent parts of bones straighten again. The second is joint internal rotation or external rotation, which aims at pulling the soft tissue that changes the joint structure to change its adaptability, so as to achieve the correction effect; The third is the correction of medial and lateral collateral ligaments, which are pulled in the same way to achieve the purpose of correction. X-O legs need to be corrected with leggings. Of course, combined with some exercise, the effect is better