Cavanagh et al in 1987 (80) divided plantar contact area in ten areas. The process of area division began with drawn a line from the center of heel to the tip of second toe (line AA’). Then, the distance from heel to top edge of the foot exclude the toes were separate into three parts by the line BB’, CC’, and DD’ that perpendicular to line AA’. Drag the borders lines both medial and lateral. The area between the tip of second toe (A’) and line DD’ divided into hallux, second metatarsal, and lateral metatarsal areas (Figure 2.9).