For teenagers with mild O-shaped legs, corrective insoles may have a certain effect, but for adults with O-shaped legs, there is basically no corrective effect. 1. Mild O-shaped leg for teenagers: Since teenagers are in the period of growth and development, they can be corrected by some corrective measures, such as corrective insoles and lower limb orthopedic braces to correct O-shaped leg. Corrective insoles may have some corrective effect on mild o-shaped leg of adolescents, mainly through improving the lower limb force line to correct o-shaped leg, and have some adjustment effect on posture when walking. 2. Mild o-shaped leg in adults: corrective insoles have no corrective effect on mild o-shaped leg in adults. Moreover, mild O-shaped legs can be observed clinically if there are no clinical symptoms. Most adults with O-shaped legs will develop osteoarthritis of the knee in the late stage, which requires surgical correction and osteotomy. It is recommended to consult a doctor and choose the treatment according to the doctor’s advice.