Physical therapy in sport : official journal of the Association of Chartered Physiotherapists in Sports Medicine
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The aim of this research was to describe the translation and cultural adaptation, and to test the validity and reliability of the Brazilian version of the Identification of Functional Ankle Instability (IdFAI) questionnaire. ⋯ The Brazilian IdFAI questionnaire is a valid and reliable instrument to identify functional ankle instability. It can be used in both clinical and research settings.