Postural-control deficits are likely due to a combination of impaired proprioception and neuromuscular control. When balancing in single-leg stance, the foot pronates and supinates in an effort to keep the body's center of gravity above the base of support. This is referred to as the “ankle strategy” of postural control. Individuals with CAI have been shown to use more of a “hip strategy” to maintain unilateral stance than uninjured individuals.137 The hip strategy is less efficient than the ankle strategy in maintaining unilateral stance. This alteration in postural-control strategy is likely due to changes in central neural control that occur in the presence of ankle-joint dysfunction. Further evidence of central changes in neuromuscular control were presented by Friden et al,117 who found bilateral impairment of postural control in subjects with acute ankle sprains.