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Comparisons of Center of Mass and Lower Extremity Kinematic Patterns between Carved and Basic Parallel Turn during Alpine Skiing

알파인 스킹 시 카빙 턴과 베이직 패러렐 턴 간의 신체중심 및 하지관절의 운동학적 패턴 비교

  • Kim, Joo-Nyeon (Department of Physical Education, Graduate School of Korea National Sport University) ;
  • Jeon, Hyun-Min (Department of Physical Education, Graduate School of Korea National Sport University) ;
  • Yoo, Si-Hyun (Department of Physical Education, Graduate School of Korea National Sport University) ;
  • Ha, Sung-He (Department of Physical Education, Graduate School of Korea National Sport University) ;
  • Kim, Jin-Hae (Department of Physical Education, College of Sport Science of Korea National Sport University) ;
  • Ryu, Ji-Seon (Department of Health and Exercise Science, College of Lifetime Sport of Korea National Sport University) ;
  • Park, Sang-Kyoon (Department of Physical Education, College of Sport Science of Korea National Sport University) ;
  • Yoon, Suk-Hoon (Department of Community Sport, College of Lifetime Sport of Korea National Sport University)
  • 김주년 (한국체육대학교 대학원 체육학과) ;
  • 전현민 (한국체육대학교 대학원 체육학과) ;
  • 류시현 (한국체육대학교 대학원 체육학과) ;
  • 하성희 (한국체육대학교 대학원 체육학과) ;
  • 김진해 (한국체육대학교 스포츠과학대학 체육학과) ;
  • 류지선 (한국체육대학교 생활체육대학 운동건강관리학과) ;
  • 박상균 (한국체육대학교 스포츠과학대학 체육학과) ;
  • 윤석훈 (한국체육대학교 생활체육대학 사회체육학과)
  • Received : 2014.08.21
  • Accepted : 2014.09.26
  • Published : 2014.09.30

Abstract

This study investigated the center of mass and lower extremity kinematic patterns between carved and basic paralell turn during alpine skiing. Six experienced skiers (age: $20.67{\pm}4.72yrs$, body mass: $72.67{\pm}7.15kg$, height: $171.00{\pm}5.51cm$) participated in this study. Each skier were asked to perform carved and basic paralell turn on a $22.95^{\circ}$ groomed slope. Each turn was divided into the initiation phase, steering phase 1 and 2. The results of this study show that the carved turn spent significantly less running time than basic paralell turn at all three phases (p<.05). Also vertical displacement of the center of mass was significantly greater in carved turn at all three phases, whereas inward leaning angle of the center of mass was significantly greater in carved turn at the steering phase 1 and 2 (p<.05). Bilateral knee and hip joint angle were significantly greater in basic paralell turn at the initiation phase and the steering phase 2 (p<.05). On the other hand, left knee and hip joint angle were significantly greater in basic paralell turn at the steering phase 1 (p<.05). In order to perform successful carved turn, we suggest that skiers should coordinate bilateral knee and hip joint angles to adjust the center of mass, depending on three ski turn phases.

Acknowledgement

Supported by : 문화체육관광부

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