O-legs can run, but should pay attention to the posture and intensity of running. O-shaped legs can generally run, but before running, you should do a good warm-up exercise to avoid knee injury, should not be a long time to exercise and excessive exercise, the frequency of running should not be too high, long and too intense running is easy to wear down the cartilage surface of the inner side of the knee joints, resulting in secondary osteoarthritis. When running, you should pay attention to the running posture, don’t run in an inside or outside position, wear suitable sports shoes and try to choose a rubber field. After running, you should do some stretching exercise. O-shaped legs should go to the hospital for correction and treatment under the guidance of doctors.