Collections > Electronic Theses and Dissertations > A Comparison of Lower Extremity Biomechanics and Muscle Activity between Individuals with Normal and Pronated Static Foot Postures

Excessive foot pronation is associated with biomechanical alterations which contribute to common lower extremity (LE) injuries. We compared ankle, knee, and hip kinematics and activation of the gluteus maximus and medius and hip adductors during gait and double and single-leg squatting tasks between individuals with pronated and normal static foot postures identified via the Foot Posture Index-6 (FPI-6). Fifty healthy subjects (25 pronated - PRO, 25 control - CON) volunteered to participate. The PRO group exhibited greater peak hip adduction (group difference = 2.9°, p = 0.022) during single-leg squatting and less rearfoot eversion excursion (group difference = 1.1°, p = 0.021) during gait. No other differences were discovered, and these small group differences are likely functionally irrelevant. These results suggest that a pronated static foot posture does not influence LE biomechanics or gluteal/adductor activity in manners consistent with heightened injury risk.