Orthopedic shoes, headed by heel shoes, is a professional medical correction, which has been incorporated into university textbooks. Invention patents are remarkable scientific and technological progress, so they are definitely beneficial. Experiments have proved the effect of negative heel shoes. Prepare materials, a book about two centimeters thick. Step on the book with your feet and touch the ground with your heels, simulating negative heel shoes. In the state of high front and low back, the center of gravity will move backward and move to the heel, so that the forefoot will feel relaxed, the arch pressure will be reduced, and the negative heel shoes will slowly recover. As for insoles ... to be honest, there is no hope. There is a bulge in the middle of the insole. The more you pad your feet, the more it hurts. The more you destroy it, the more you can't find the principle. Personally, I feel that insoles are useless and may be harmful. Be careful.