알파인 스킹 시 회전기술 난이도 및 회전반경에 따른 3차원 운동학적 차이
Three-dimensional kinematic differences between turning skill level and radius during alpine skiing
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[목적] 본 연구는 베이직 롱턴, 카빙 롱턴, 베이직 숏턴, 카빙 숏턴의 회전구간별 3차원 운동학적 분석을 통해 발목, 무릎, 엉덩관절의 자유도를 고려한 3차원 관절각도를 조사하는데 있다. [방법] 총 14명의 대한스키지도자연맹의 알파인 스키 정강사가 본 연구의 대상자로 참여하였다. 각 알파인 스키어는 회전기술의 난이도와 반경에 따라 분류된 4가지의 회전기술을 수행하였다. 8채널의 관성센서를 사용하여 발목, 무릎, 엉덩관절의 3차원 관절각을 산출하였다. [결과] 롱턴과 카빙 수행 시 하지관절의 좌우축 및 수직축 움직임에 유의한 차이를 나타냈으며(p<.05), Steering phase 1, 2와 complete phase에서 하지관절의 전후축 움직임에 유의한 차이를 나타냈다(p<.05). [결론] 알파인 스키에서 숏턴은 롱턴에 비해 하지관절의 복합적인 움직임이 요구되며, 롱턴은 숏턴에 비해 발목관절의 수직축 움직임, 카빙과 숏턴은 하지관절의 좌우축 움직임이 더 요구된다.
Abstract
[Purpose] The purpose of this study was to investigate the three dimensional joint angles of the ankle, knee and hip during basic long turn, carving long turn, basic short turn and carving short turn. [Methods] Fourteen alpine ski instructors from Korea Ski Instructor Association participated in this study. Each skier asked to perform 4-types of turning technique, classified by radius and level. 8 inertial measurement units were used to measure three-dimensional joint angles of the ankle, knee and hip joint. [Results] Significant differences were found the lower extremity joint angles on the mediolateral and vertical axis during long-turn and carving-turn (p<.05). significant differences were found the lower extremity joint angles on the anteroposterior axis in the steering phases 1, 2 and complete phase (p<.05). [Conclusion] In the Alpine skiing, the short turn requires a complex movement of the lower limb joint compared to the long turn. When performing a long turn, the movement of the ankle joint on the vertical axis are required compared to the short turn. And the carving and short turn need to the movements of the lower limb joint on the mediolateral axis.
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