Related Experiment Video
Updated: Jun 5, 2026
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.
Objective:
To investigate the effects of swelling on postural control and patient-reported outcomes in individuals with chronic ankle instability (CAI).
Design:
Cross-sectional study.
Setting:
Controlled laboratory.
Participants:
A total of 60 participants-20 CAI individuals with swelling (swelling), 20 CAI individuals without swelling (nonswelling), and 20 healthy controls (control)-were recruited.
Independent Variables:
Group (swelling, nonswelling, and control).
Main Outcome Measures:
Participants performed 3 trials of single-leg hop-to-stabilization and single-leg stance tasks, along with patient-reported outcomes. A one-way analysis of variance was used to assess group differences in dynamic and static postural control and patient-reported outcomes.
Results:
The swelling group exhibited worse dynamic postural control in vertical stability index and dynamic postural stability index compared with the nonswelling ( P = 0.03, P = 0.04) and control ( P < 0.01 and P < 0.01) groups. The nonswelling group showed similar dynamic postural control with the control group. Swelling ( P < 0.01 and P < 0.01) and nonswelling ( P = 0.01 and P < 0.01) groups showed worse static postural control center of pressure mediolateral velocity and center of pressure anteroposterior velocity compared with the control group. Swelling and nonswelling groups showed differences in patient-reported outcomes about ankle function and instability compared with the control group, but there was no difference in patient-reported outcomes between the swelling and nonswelling groups themselves.
Conclusion:
Ankle swelling contributes to altered neuromuscular control, resulting in worse dynamic postural control, but affects neither static postural control nor patient-reported outcomes in CAI individuals.
