Abstract Summary
The efficacy of external ankle braces to protect against sudden inversion sprain has yet to be determined, while taking into account the possible placebo effect of brace application. In this controlled study, we assessed kinematics using both actively protecting and placebo braces in subjects with a history of lateral ankle sprain during single-limbed tasks. We found that only active bracing reduced inversion angles during inversion tilts, and no effect found with placebo bracing.