Feet are a very important element in building the body and an important component of human movement. Foot defects, as mentioned above, may be the primary ground for the occurrence of other defects and asymmetries of the human body, including, for example, scoliosis. The disadvantages of the feet include: Flat foot. We talk about it when, under load conditions, a lowered longitudinal arch of the foot is visible or the arch is not visible, allowing the contact of the entire sole part of the foot with the ground. A static flat foot is one of the most common types of defects in the musculoskeletal system. A hollow foot can also be identified on a diagnostic podoscope. It is the opposite of a flat foot, it is characterized by excessive curvature of the medial longitudinal arch, the arch is higher than it should be. The cavity deepens and the section between the heel tumor and the metatarsal heads is shortened.