Pronation is a natural movement of the foot that occurs during landing. . As the body weight is loaded onto it, the arch of the foot flattens out and the heel moves outward. . This movement increases elasticity of foot which helps to absorb shock and distribute the impact forces evenly through the foot and leg. . Supination is also natural and refers to movement in which the arch of the foot rises and the heel moves inward. . With this motion foot becomes more rigid, which helps to propel the bo