1. Ankle

Tears of the lateral ankle ligaments are among the most common sports injuries (Jackson et al., 1974). The spectrum of injury ranges from mild sprains, after which an athlete might return to activity the same day, to frank rupture of one or more ligaments, which can cause considerable lost time from sport and persistent symptoms. Furthermore, chronic lateral instability occurs in nearly 20% of patients (Boruta et al., 1990; Freeman, 1965; Freeman et al., 1965; Kannus and Renstrom, 1991; Rijke et al., 1988).