Step on the footprints with bare feet, and see that there is no arch. Flat feet can wear negative heel shoes. Negative heel shoes have a healing effect on flat feet, which can reduce the pressure of the arch and avoid the development of flat feet. First do a simulation experience. Find a book that is two centimeters thick and put your feet together. Step on the forefoot and the heel on the ground to simulate the feeling of standing in negative heel shoes. Negative heel shoes can reduce the pressure of the forefoot and simulate the experience of shifting the center of gravity. After all the force is moved to the heel, the pressure on the forefoot will be reduced.