Loading Induced Change in Arch Height in Those With and Without Chronic Ankle Instability: A Critically Appraised Topic

Introduction/Clinical Scenario : Chronic ankle instability (CAI) is characterized by repeated ankle sprains, frequent episodes of giving way, and sensorimotor impairments including poor balance, and gait alterations. Foot morphology differences particularly loading induced changes in arch height (e.g., navicular drop), have been suggested to be a contributing factor to CAI and its associated impairments. However, the evidence is mixed, and no comprehensive evaluation of the literature has been completed. Focused Clinical Question : Does loading induced changes in arch height differ between those with and without CAI? Summary of Key Findings : A comprehensive search yielded three cross-sectional studies comparing loading induced changes in arch height between those with and without CAI. No significant differences in the magnitude of arch height change were noted between groups in the original investigations. Clinical Bottom Line : Based on the limited existing evidence, loading induced changes in arch height do not differ between those with and without CAI. Strength of Recommendation : Consistent findings in moderate to high quality studies suggest a level B strength of recommendation regarding the clinical bottom line.