Efficacy of motion control shoes for reducing the frequency response of ground reaction forces in fatigued runners

Fatigue along with pronated feet during running are possible risk factors for injuries. Motion control shoes were designed to limit excessive foot motion in runners, but its clinical efficacy has not been well reported. This study investigated the ground reaction force characteristics in novice female runners with pronated feet during running with different footwear before and after fatigue of the lower limb muscles. 22 novice female runners with pronated feet were volunteered to participate in this study. A Kistler force plate and a Vicon three-dimensional motion analysis system were used to record the ground reaction forces and gait pattern of participants, when running with motion control shoes and control shoes before and after fatigue of the lower limb muscles. The results of this study showed that the frequency with a power of 99.5% of in the vertical ground reaction force with the motion control shoes were lower than that control shoes during post-test. the frequency with a power of 99.5% of in the anterior-posterior Center of pressure ground reaction force with the motion control shoes were greater than that motion control shoes during pre-test. the frequency with a power of 99.5% of in the Medio-lateral Center of pressure ground reaction force with the motion control shoes were greater than that control shoes during pre-test. the frequency with a power of 99.5% of in the free moment ground reaction force with the control shoes were greater than that control shoes during post-test.