Validation of the Identification of Functional Ankle Instability (IdFAI) in Italian

Participants without ankle sprain. 1. Age ≥ 18aa 2. Speak Italian on a daily basis 3. No pathologies or surgical treatments in the lower limbs currently or in the past Participants with ankle sprain. Inclusion Criteria 1. Age ≥ 18aa 2. Speak Italian on a daily basis 3. At least one ankle sprain 4. Recurrent sprain to the same ankle and/or sensation of ankle instability and/or 'giving way' Exclusion Criteria 1. Inability to understand written Italian 2. Acute lower extremity injury occurred in the three months preceding the compilation of the questionnaire 3. History of others lower extremity musculoskeletal diseases or injuries of other joints (i.e, hip, knee), previous ankle fractures or systemic pathologies (i.e., neurological disorders, rheumatoid arthritis) currently or in the past 4. History of surgical treatments in either lower limb (bones, joints, nerves)