Negative heel shoes are not only as simple as high before and low after, but also introduced by Science and Technology Daily, and the search criteria for negative heel shoes are more detailed. The safety angle of negative heel shoes is 2 to 7 degrees, and at the same time, there should be an inward inclination angle, that is, the sole should be slightly inclined from the outside to the inside, and the heel thickness should not exceed 15 mm, which is related to whether it is effective or not, whether it can avoid damage, and whether negative heel shoes do not support slippers and so on.
Regular professional products have different product models for different purposes. Type K is low back pain, type P is flat foot, and type C is used within half a year after delivery. It is also important to have professional rehabilitation guidance during use. Just ask the doctor. Negative heel shoes have invention patents and are protected by law. Beware of illegal fakes that endanger health.