The Role of Hip Strength Deficits on Dynamic Function in Those with Chronic Ankle Instability

Ankle sprain is the most common sustained during physical activity, accounting for 20% of musculoskeletal joint injuries. While some individuals who suffer an ankle sprain may recover with no lasting deficits, studies have shown that the majority of individuals with a history of a lateral ankle sprain have residual symptoms referred to as chronic ankle instability (CAI) as recurrent sprains, sensations of ankle “giving way,” and feelings of instability. While these impairments are local to the ankle, more proximal strength deficits have also been documented, and likely are contributing to deficits in dynamic balance. The purpose of this study is to compare isometric peak torque for hip extension and abduction in adolescents and adults between individuals with CAI and healthy controls.