Why does the outer sole wear?

Wear on the outside of the sole indicates excessive pressure on the outside of the heel. This situation is usually due to the high arch foot, so that the weight tends to the outside of the foot, resulting in prominent wear on the outside of the shoe. When they run, they first land on their heels and then step by step along the outside of the soles of their feet. When they land, their feet walk along the outer edge of their footsteps, that is, their feet always keep a relatively inverted position. This kind of wear is easy to cause joint sprain and injury, and long-term uneven stress will also lead to the wear of cartilage outside the knee joint, which will lead to arthritis. It is suggested to consult a podiatrist or orthopedic surgeon, do gait exercises, develop correct walking and running postures, and correct bone structure.

Normal people walk in a slight figure of eight, and the heel will wear more or less, and the wear position is concentrated on the outside of the heel and symmetrical. Usually, if the newly bought shoes wear off less than 20% in half a year, they are generally regarded as normal. If you wear off 20%~30% within 3 months, it is not a question of walking posture, and you can basically judge that there is something wrong with your body. Common causes are hip joint diseases, such as congenital subluxation of hip joint, dysplasia of hip joint and scoliosis.

Walking outside the figure of eight, over time, the knees will also move outward and the legs will become X-shaped. When these people get older, they will have joint pain and accelerate joint aging. Hua Lin said that some people have serious internal wear on their heels. Usually these people walk in a figure of eight and need orthopedic correction. Because there are still some diseases hidden behind the inner eight characters. Clinically, some patients with rickets and tibial development problems often walk in the inner eight characters. In addition to "O-leg", it can also be expressed as "X-leg".