Analysis of illness: The corrective methods of O-leg are: surgery, instruments, splints, leggings, exercise, correcting insoles, etc. Surgery is suitable for patients with very serious O-leg, or patients with osteoarthritis and joint pain. Suggestion: Non-surgical correction method: You can use the muscles of different parts of the leg by slightly changing the standing posture, which is the biggest feature of squat exercise. Knees and thighs are close together when squatting.