승마 속보 시 등자 길이에 따른 체간기울기와 양측 하지의 협응성 비교분석 : 비대칭 지수 및 전체이동지수 알고리즘 개발 = Analysis of the Coordination of the Trunk Tilting Angle and Bilateral Lower Limbs According to the Stir rups Length dur ing Trot in Equestrian: Asymmetric Index Development of Overall Movement Index Algorithm

다국어 초록 (Multilingual Abstract)

Purpose : The purpose of this study was to analyze the coordination of the trunk tilting angle and bilateral lower limbs according to the stirrups lengthduring trot in equestrian· Methods : Participants selected as subject were consisted of adult male(n=7, mean age: 45·00±3·78 yrs, mean height: 172·50±2·44 cm, mean body mass:76·95±4·40 kg, mean, mean leg length: 97·30±2·60 cm)· They were divided into 3-types of stirrups lengths(67 cm, 72 cm, 77 cm) during trot· Thevariables analyzed were consisted of the trunk front-rear angle, lower limb joint(Right·Left hip, knee, ankle), overall movement index(OMI) of the lowerlimbs(thigh, shank, foot) and asymmetry index(AI%) during trot· Results : The average angle in hip and knee joint showed more extended posture according to the increase of stirrups lengths and ankle angle showed moreplantarflexion posture according to increase of stirrups length during 1 stride in trot· Also, average angle showed more extended posture in right hip and anklejoint than that of left· The angle of knee joint didn`t show significant difference statistically between right and left· Also asymmetric index in average angleof hip, knee and ankle joint didn`t show significant difference statistically in between lower limbs, but hip joint showed higher asymmetric index in stirruplength of 77 cm and ankle joint showed higher asymmetric index in stirrup length of 67 cm than that of the others respectively· The FR angle in trunkof horse-rider showed relative backward leaning motions at stirrup length of 67 cm and 77 cm than that of stirrup length of 72 cm during stance and swingphase· OMI in thigh, shank, and foot limbs didn`t show significant difference statistically according to the stirrups length of right and·left lower limbs, butleft lower limbs showed higher index than that of right lower limb· Stirrup length of 72 cm in shank and foot limbs showed higher index than that of stirruplength of 67 cm and 77 cm· But stirrup length of 72 cm showed higher asymmetric index than that of stirrups length of 67 cm and 77 cm· Conclusions :When considering the above, 72 cm(ratio of lower limb 74·04%) stirrup lengths could be useful in posture correction and stabilization than67cm(ratio of lower limb 68·69%) and 77 cm(ratio of lower limb 79·18%) stirrup lengths during trot in horse back riding·

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