| Summary: | 碩士 === 國立臺灣科技大學 === 醫學工程研究所 === 103 === The purpose of our study was to evaluate the effects of four types of rearfoot midsole with varus wedge on joint kinematics and kinetics of lower extremity during walking by comparing with control shoes without rearfoot wedge design. The eleven healthy asymptomatic males were recruited to perform gait analysis during walking while wearing testing shoes which were designed with 7 degrees varus wedge on bottom layer and control shoes. Subjective comfort and objective biomechanical indices, namely joint angles and moments at hip, knee, and ankle as well as ground reaction force and EMG variables during gait were calculated and compared between shoes conditions. When wearing varus wedge shoes, subjective hardness during walking is higher than that during CON (p=0.015). For the ankle joint kinetics, this first peak shoes evertor moment infer to the demand at the ankle joint which was associated with the abrupt eversion angular displacement occurs during the loading response. Despite of the non-significant changes of frontal plan joint kinematic variables, smaller peak ankle evertor moment were found while wearing varus wedge shoes, which may be associated with the smaller lateral ground reaction force and its loading rate. The results also showed that when wearing varus wedge shoes, without significant shoe condition effect on shoes kinematics variables, significantly decreased knee internal rotation was found, which may be help for decreased loading on lateral aspect of patella. In addition, varus wedge shoes seem to favorite the firing of muscle on the medial side of the knee compared with those on the lateral side. Lower peroneal longus muscle activation was also found. Finding in the current tend to support some previous researches which reported smaller significant differences of joint kinematic than joint kinetic when wearing VW. As indicated by several positive subjective and objective findings when wearing varus wedge in healthy adults, the design is encouraged for the use of footwear markets and for evaluating biomechanical effects for patients with musculoskeletal disorders such as patella femoral pain syndrome in future studies.
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