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Updated: Apr 7, 2026

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Published on: September 18, 2020

Short-Foot Exercises Improve Postural Control and Ankle Instability in Chronic Ankle Instability: A Randomized

Mikuto Katsuya¹, Kazushi Yoshida¹, Shogo Takano¹

¹Graduate School of Health and Sport Sciences, Chukyo University, Aichi, Japan.

Journal of Athletic Training

|April 6, 2026

Summary

Short-foot exercise (SFE) improved static postural control and reduced subjective ankle instability in individuals with chronic ankle instability (CAI). Dynamic control showed no significant changes after the 4-week program.

Keywords:

balance performance intrinsic foot muscle training rehabilitation

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Area of Science:

Sports Medicine
Rehabilitation Science
Biomechanics

Background:

Chronic ankle instability (CAI) is frequently linked to intrinsic foot muscle weakness and atrophy.
Short-foot exercise (SFE) is a targeted intervention to activate these muscles, but its efficacy in CAI populations requires further investigation.

Purpose of the Study:

To evaluate the impact of a 4-week SFE program on static and dynamic postural control.
To assess changes in subjective ankle instability among individuals with CAI following SFE.

Main Methods:

A randomized controlled trial was conducted with 24 participants diagnosed with CAI, allocated to either an SFE intervention group or a control group.
The intervention group engaged in SFE three times weekly for four weeks, while the control group maintained their usual activities.
Postural control (static and dynamic) and subjective instability were measured pre- and post-intervention using established clinical tools.

Main Results:

Participants in the SFE group demonstrated significant improvements in static postural control compared to the control group (P < .05).
Subjective ankle instability was also significantly reduced in the intervention group post-program (P < .05).
No significant differences were observed in dynamic postural control between the groups (P > .05).

Conclusions:

A 4-week Short-foot exercise program is effective in enhancing static postural control and improving subjective ankle instability in individuals with Chronic Ankle Instability.
These findings support the incorporation of SFE into comprehensive rehabilitation strategies for CAI.
Further research may explore optimal SFE protocols and its effects on dynamic balance and injury prevention.