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Updated: Jun 5, 2026
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Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
Published on: September 18, 2020
Effects of Swelling on Static and Dynamic Postural Control and Patient-Reported Outcomes in Individuals With Chronic
Minsub Oh1, Hyunwook Lee2, Seunguk Han3
1Department of Exercise Sciences, Brigham Young University, Provo, Utah.
Summary
Ankle swelling worsens dynamic postural control in individuals with chronic ankle instability (CAI). However, swelling does not impact static postural control or patient-reported outcomes in CAI.
Area of Science:
- Biomechanics
- Neuromuscular Control
- Sports Medicine
Background:
- Chronic ankle instability (CAI) is a prevalent condition affecting postural control.
- Ankle swelling is a common complication that may further impair function.
Purpose of the Study:
- To investigate the impact of ankle swelling on postural control and patient-reported outcomes in individuals with CAI.
- To compare individuals with CAI and swelling, CAI without swelling, and healthy controls.
Main Methods:
- Cross-sectional, controlled laboratory study.
- 60 participants: 20 CAI with swelling, 20 CAI without swelling, 20 healthy controls.
- Assessed dynamic and static postural control (single-leg hop-to-stabilization, single-leg stance) and patient-reported outcomes.
Main Results:
- The swelling group demonstrated significantly worse dynamic postural control compared to both nonswelling and control groups.
- Both swelling and nonswelling groups exhibited poorer static postural control than the control group.
- While both CAI groups reported worse ankle function than controls, there were no differences between swelling and nonswelling groups for patient-reported outcomes.
Conclusions:
- Ankle swelling exacerbates dynamic postural control deficits in individuals with CAI.
- Swelling does not appear to influence static postural control or patient-reported outcomes in this population.
- Findings suggest that managing swelling may be crucial for improving dynamic stability in CAI.
