Postural control measured before and after simulated ankle inversion landings among individuals with chronic ankle instability, copers, and controls

• Published in: Gait & posture 2024-01, Vol.107, p.17-22
• Main Authors: Oh, Minsub, Lee, Hyunwook, Han, Seunguk, Hopkins, J. Ty
• Format: Article
• Language: English
• Subjects: Ankle; Ankle Injuries; Ankle inversion landing; Ankle Joint; Chronic ankle instability; Chronic Disease; Cross-Sectional Studies; Humans; Joint Instability; Postural Balance - physiology; Postural control
• ISSN: 0966-6362; 1879-2219
• DOI: 10.1016/j.gaitpost.2023.09.002

Postural control measured during single-leg stance and single-leg hop stabilization has been used to estimate sensorimotor function in CAI individuals and copers. To date, studies have not used postural control tasks as a way of measuring responses to sudden changes in sensory information after simulated ankle inversion landings. A cross-sectional study was performed to identify any differences in static and dynamic postural control before and after simulated ankle inversion landings among individuals with chronic ankle instability (CAI), copers, and healthy controls. Nineteen CAI individuals, 19 copers, and 19 controls participated in this study. Participants performed 3 static and dynamic balance tasks before and after simulated ankle inversion landings onto a 25° tilted platform from a height of 30 cm. The main outcome measures were the center of pressure (COP) velocity and range from the single-leg stance, as well as the dynamic postural stability index from the single-leg hop stabilization. The Wilcoxon signed-rank test was used to compare posttest and pretest differences in static and dynamic postural control between groups. In the static postural control measures, the CAI group had a higher difference in COP velocity and COP range in the frontal plane (p