Effects of Chronic Pain on Static and Dynamic Postural Control in Chronic Ankle Instability

Area of Science:

• Biomechanics and Motor Control
• Musculoskeletal Rehabilitation
• Pain Management

Background:

• Chronic ankle instability (CAI) is prevalent and often associated with impaired postural control.
• The influence of varying chronic pain levels on postural control in CAI populations requires further elucidation.

Purpose of the Study:

• To investigate the impact of chronic pain severity on static and dynamic postural control in individuals with CAI.
• To compare postural control between individuals with CAI experiencing high pain, low pain, and healthy controls.

Main Methods:

• A cross-sectional, controlled laboratory study involving 60 participants divided into three groups: high pain CAI, low pain CAI, and healthy controls.
• Postural control was assessed using single-leg stance (eyes open/closed), the Star Excursion Balance Test, and single-leg hop to stabilization.
• Independent variables included group status and visual conditions during postural tasks.

Main Results:

• The high pain CAI group reported poorer functional outcomes (Foot and Ankle Ability Measure) compared to low pain CAI and control groups.
• Both high and low pain CAI groups demonstrated reduced static postural control in the mediolateral direction versus controls.
• The high pain group exhibited significantly decreased static postural control under eyes-closed conditions and altered dynamic postural control parameters.

Conclusions:

• Chronic pain is a significant factor detrimentally affecting both static and dynamic postural control in individuals with CAI.
• Clinical management of CAI should integrate assessment and management of chronic pain to optimize postural stability and functional recovery.