Effect of muscular Training on chronic Instability of the upper Ankle Joint

Chronic ankle instability (CAI) is a common consequence of supination trauma with injuries to the anterior and posterior talofibular and calcaneofibular ligaments. The focus of rehabilitation training is strengthening the peronei muscles. Exercises on the peroneus brevis muscle as part of rehabilitation training have been studied several times; the present study examines the effect of specific training of the peroneus longus muscle in comparison to the peroneus brevis muscle on symptoms and function.