• Ji-Myeong Park, Sang-Ho Han, Byeong-Chae Cho, Se-Min Lee, Mal-Soon Shin, Jae-Ho Yu, Ho-Jin Kim, Hyun-Dong Noh, Min-Suk Cho, and Myung-Ki Kim.
• Sports Medical Research Center, Daechan Hospital, 590 Inju-daero, Namdong-gu, Incheon 21570, Republic of Korea.
• Medicina (Kaunas). 2024 Feb 15; 60 (2).

AbstractBackground and Objectives: This study aimed to evaluate the effects of subtalar joint axis-based balance exercises on the anterior talofibular ligament (ATFL) thickness, ankle strength, and ankle stability after an arthroscopic modified Broström operation (AMBO) for chronic ankle instability (CAI). Materials and Methods: The study included 47 patients diagnosed with CAI who underwent AMBO and were randomly divided into three groups: control (n = 11), general balance exercise (n = 17), and subtalar joint axis balance exercise (n = 19), regardless of the affected area. Participants in the exercise rehabilitation group performed exercises for 60 min twice a week for six weeks, starting six weeks after AMBO. ATFL thickness, ankle strength, and ankle dynamic stability were measured using musculoskeletal ultrasonography, Biodex, and Y-balance test, respectively, before and after treatment. Results: Compared with the remaining groups, the subtalar joint axis balance exercise group had reduced ATFL thickness (p = 0.000), improved ankle strength for eversion (p = 0.000) and inversion (p = 0.000), and enhanced ankle stability (p = 0.000). Conclusions: The study results suggest that subtalar joint axis-based balance exercises may contribute to the early recovery of the ankle joint after AMBO.

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