The purpose of this study is to investigate the association between dynamic postural control and clinical measures of (ankle and hip strength, ankle DFROM and position sense) and radiological measures in patients with unilateral CAI.
At least one significant unilateral lateral ankle sprain in which the subject was unable to walk independently without the aid of crutches (the first sprain occurred more than 12 months ago).
Repeated bouts of lateral ankle injury (last injury had to be more than three months prior to inclusion in the study).
Feeling of ankle instability "giving way", at least 2 episodes in the last 6 months (Terada et al., 2014).
Pain during intense loading.
A previous trauma or surgery to the trunk or lower extremities other than an ankle sprain.
Neurological or vestibular impairments with remaining deficits.
No participant with CAI had acutely sprained his or her ankle in the 3 months prior to the testing.
Participants will be excluded if they have participated in any rehabilitation in the past 6 months.