초록 close

R. B. KIM, The Evaluation of Custom Foot Orthotics for Injury Prevention of Joggers. Korean Journal of Sport Biomechanics, Vol. 16, No. 1, pp.19-30, 2006. The purpose of this study was to examine the effect of foot orthotics on the overall comfort and muscle activity during running. The subjects were 10 members from the joggers' club which consisted of 2 women and 8 men. These individuals ran on the treadmill by 4.0m/s speed with and without the custom foot orthotics. The data concerning the overall comfort was collected by a questionairre that examined the overall comfort, heel cushioning, forefoot cushioning, medio-lateral control, arch height, heel cup fit, shoe heel width, forefoot width, and shoe length. The MegaWin ver. 2.1(Mega Electronics Ltd, Ma. Finland) was used to gain electromyography signals of the muscle activity; Tibialis anterior, medial gastronemius, lateral gastronemius, vastus lateralis, vastus medialis, biceps femoris, and rectus femoris were measured. The results of the study were as follows. 1. During running the overall comfort was higher for the foot arthotic condition than the nonorthotic condition. Among the inquiries the overall comfort showed the biggest difference comparing the two conditions. and the shoe heel width showed the highest score for comfort. 2. The muscle activity of the biceps femoris, and vastus lateralis in the stance period decreased due to the foot orthotics. The muscle activity of the vastus medialis in the swing period aslo decreased and the muscle activity tibialis anterior in the stance and swing stance decreased as well. During running, orthotics showed positive result in foot comfort. The foot comfort related to decreased stress, muscle activity, and foot arch strain. Overall comfort and the adequate decrease of muscle activity were associated with injury prevention and the best method to prevent injury semms to be the maintenance of foot comfort.