What about the O-shaped leg formed by practicing martial arts?

It has little to do with practicing martial arts. O-leg is caused by tendon, and the knee spacing is moderate at 1-3. If it is moderate, it is serious if it is greater than 6. Don't cross your legs or stand on one foot at ordinary times. If you walk outside the figure of eight, you can go online to buy corrective insoles, which can slow down O-legs. If it is mild, you can buy a bandage online to correct the O-leg. If it is moderate, it is necessary to insist on daily operation. If it is serious, the recommended cost is