페달링 시 웨지의 삽입 유무에 따른 족저압의 영역별 비교 연구

Abstract

The purpose of this study was to study effects of inserted wedge on foot pressure during pedaling. Seven cyclists (age: 34.4±4.6year, height: 174.0±4.2cm, weight: 84.6±6.2kg) participated in 10 second maximal tests with and without wedges by their condition of varus or valgus. Movement of the knee joint was obtained through 3D motion analysis system (Motion analysis Corps., USA), and foot pressure were measured by F-scan System (Tekscan Inc., Boston, USA). Foot pressure was analyzed by contact area, contact pressure, peak contact pressure, contact force and peak contact force of 4 regions such as toe, forefoot, midfoot and rear-foot. CV(coefficient of variation) of mediolateral trajectory of the knee and CV of mediolateral COP(center of pressure) of foot pressure, which is closely related with lower limb vertical alignment, were analyzed. Results showed that CV of mediolateral trajectory of the knee and CV of COP at forefoot were significantly decreased with inserted wedge (p.05). There were no significant differences in CV of COP at toe, midfoot and rearfoot. Contact pressure, peak contact pressure, contact force, and peak contact force at the forefoot were signifi-cantly increased after inserting wedges (p.05) and there was no significant difference in contact area at the forefoot after inserting wedges. Contact area and contact force at the midfoot were significantly decreased with wedge(p.05). However, there was no significant differences in contact pressure and peak contact pres-sure at the midfoot. There were no significant differences in foot pressure at toe and rearfoot with wedges. It could be concluded that inserted wedges made increasing effects of contact pressure, peak contact pressure, contact force, peak contact force of the forefoot by decreasing the variability of the knee and COP of foot pressure. Inserting wedges by considering rider`s physical characteristics will help vertical alignment of lower limb and the resulting vertical alignment will do positive effects on the prevention of injuries and efficiency of force transmission to the pedal.