When the person's foot is not loaded and free, the heel toe will naturally bend upwards from the toe to the end of the toe and form an urban fixed angle with the plane of the foot. This angle is the degree of the foot's condition, also known as the foot's Formerly, generally, the natural degree of the foot is about 15 degrees. The front of the shoe last is based on the natural twist of the foot and is designed taking into account the requirements of the style and structure of the shoe, although The length of the sole is longer than the length of the foot, but due to the front ridge, the walking will still feel light, and the higher the chin, the smaller the flexion of the metatarsophalangeal joint of the foot when walking. The height of the front of the shoe is high. Can also reduce the power of the human foot bending shoes, reduce the degree of wear on the front of the shoe, protect the sutures and reduce the folds of the upper bending force. The front blemishes are too low, and the wear on the front part of the shoes can be accelerated. Wrinkles and grinding the feet. However, too high anterior tendon will lead to the opposite result, because the anterior height of the ankle increases the convexity of the forefoot area, which not only affects the wear, but also can cause severe cross-bow arches. The collapse, but also to promote the wrinkling of the lateral flank of the womb, so that the shoes deformed. Therefore, the front of the shoe must be moderate. In general, the front of adult leather shoes is generally controlled in the 15 ~ 18 mm is most appropriate, such as more than 18 mm, the toe feels upward and uncomfortable; while in normal with the height Below, if the front cymbal is less than 15 mm, the front ridge is very easy to wrinkle, and the front of the shoe is also worn faster.
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