Abstract
[Purpose] The purpose of this study is to figure out the information obtainable from ankle instability instrument (AII) survey among various factors related to the ankle instability. [Participants and Methods] This study targeted on 34 participants, divided the participants into stability group and instability group based on AII survey results, and measured the maximum isometric contraction, proprioception, dynamic balance, and maximum joint angles. The independent t-test was used. [Results] The maximum isometric contraction showed significance in the plantar flexion while the proprioceptive sense showed significance in both dorsiflexion and plantar flexion. The dynamic balanced showed significance in the anterior direction while the maximum joint angles showed significance in the dorsiflexion. [Conclusion] According to the results, the participants who were classified as ankle instability patients based on AII survey results involved problems in the maximum isometric contraction, proprioception, dynamic balance, and maximum joint angles.