The only physiological movement of the ankle joint is flexion/extension of the foot relative to the leg. However, while walking, there may be lateral movements of the ankle, which can cause ligament damage (sprains) or bone injuries (malleolar fractures).
The foot is essential for the human body to stand upright. It also plays a shock absorption role and serves to propel the foot forwards when walking. Feet can be subject to anatomical, tissue and articulation deformations.