본 연구의 목적은 용상(Clean & Jerk) 종목의 클린(Clean)과 ��Jerk) 동작 중 ��Jerk) 동작의 성공·실패에 따른 동작의 운동학적 차이를 규명하는데 그 목적이 있다. 연구의 대상은 1999년 제 80회 전국체육대회 역도경기 참가선수로서 56㎏급 일반부 선수 중 입상자 1, 2위 2명을 대상으로 하였다. 실제경기 상황을 촬영하기 위해 비디오 카메라를 전방, 좌·우측(각각 45˚) 각도에 3대를 설치하였으며, 촬영속도를 30frame/sec로 ...
본 연구의 목적은 용상(Clean & Jerk) 종목의 클린(Clean)과 ��Jerk) 동작 중 ��Jerk) 동작의 성공·실패에 따른 동작의 운동학적 차이를 규명하는데 그 목적이 있다. 연구의 대상은 1999년 제 80회 전국체육대회 역도경기 참가선수로서 56㎏급 일반부 선수 중 입상자 1, 2위 2명을 대상으로 하였다. 실제경기 상황을 촬영하기 위해 비디오 카메라를 전방, 좌·우측(각각 45˚) 각도에 3대를 설치하였으며, 촬영속도를 30frame/sec로 세팅 후 피험자의 동작이 시작되기 4~5sec 전에 비디오 카메라를 작동시켜 모든 경기 상황을 녹화하여 3차원 분석을 실시하였다. 본 연구의 결과를 요약해 보면 다음과 같다. 1) 각 피험자의 성공·실패시기에 따른 ��Jerk) 동작의 소요시간은 A선수가 성공시기 1, 2, 3, 4국면에 0.12, 0.03, 0.37, 1.97sec로 나타났고 실패시기에는 0.50, 0.18, 0.37sec로 나타났으며, B선수는 성공시기에 0.52, 0.18, 0.52, 1.68sec로 나타났고, 실패시기에는 0.55, 0.18, 0.45. 0.35로 나타났다. 이러한 결과로 볼 때 실패시기 보다 성공시기에 각 국면별 소요시간이 짧게 나타났으며, B선수의 소요시간 보다는 기록이 높은 A선수의 소요시간이 짧게 나타났다. 2) 피험자들의 성공·실패시기에 따른 ��Jerk) 동작시 각 관절의 각도 중 슬관절 각도는 A선수의 실패시기보다 성공시기에 제 2, 3국면에 1.7, 26.1˚로 각도의 변화가 더 적었으며, B선수는 제 1, 2국면에서 0.6, 5.4˚로 각도의 변화가 적었다. 족관절 각도는 A선수가 실패시기보다 성공시기 제 1, 3국면에서 0.2, 41.2˚로 각도의 변화가 더 적었다. 전경각도는 A선수가 실패시기보다 성공시기 1, 3국면에서 0.2, 7.1˚의 각도가 적게 나타났으며, B선수는 실패시기보다 성공시기에 0.1˚ 더 적게 나타났다. 3) 피험자들의 성공·실패시기에 따른 ��Jerk) 동작시 각 국면별 바벨이동궤적은 성공시기에 A선수의 높이변화가 -13.5, 18.3, 16.1, 28.5cm로 나타났고 실패시기에 -16.4, 20.8, 7.3cm로 나타났으며, 전·후 이동거리 이동은 성공시기에 -1.2, 1.5, -0.6, -26.7로 나타났고 실패시기에는 2.9, 2.2, -1.3으로 나타났다. B선수의 성공시기 높이변화는 -13.6, 24.2, 17.0, 27.6cm로 나타났고 실패시기시 -15.0, 21.5, 12.0, 0.2cm로 나타났으며, 전·후 이동거리는 성공시기에 1.3, -0.3, -4.9, 8.5cm로 나타났고, 실패시기에는 5.1, -0.4, -7.1cm로 나타났다. A·B선수 모두 준비자세(Jerk Start)를 기준으로 수직 및 전·후거리이동이 적은 것으로 나타났으며, B선수보다는 A선수가 수직 및 전·후 이동거리가 적게 나타났다. 이러한 결과를 볼 때 용상종목 ��Jerk) 동작시 각 국면별 소요시간은 정확한 자세에 따라 짧게 실시해야 하며, 각 관절각도 변화는 준비자세(Jerk Start)를 기준으로 각도의 변화가 적어야 하고, 바벨이동궤적 또한 준비자세(Jerk Start)를 기준으로 수직 및 전후거리의 변화가 적어야 한다고 생각된다.
본 연구의 목적은 용상(Clean & Jerk) 종목의 클린(Clean)과 ��Jerk) 동작 중 ��Jerk) 동작의 성공·실패에 따른 동작의 운동학적 차이를 규명하는데 그 목적이 있다. 연구의 대상은 1999년 제 80회 전국체육대회 역도경기 참가선수로서 56㎏급 일반부 선수 중 입상자 1, 2위 2명을 대상으로 하였다. 실제경기 상황을 촬영하기 위해 비디오 카메라를 전방, 좌·우측(각각 45˚) 각도에 3대를 설치하였으며, 촬영속도를 30frame/sec로 세팅 후 피험자의 동작이 시작되기 4~5sec 전에 비디오 카메라를 작동시켜 모든 경기 상황을 녹화하여 3차원 분석을 실시하였다. 본 연구의 결과를 요약해 보면 다음과 같다. 1) 각 피험자의 성공·실패시기에 따른 ��Jerk) 동작의 소요시간은 A선수가 성공시기 1, 2, 3, 4국면에 0.12, 0.03, 0.37, 1.97sec로 나타났고 실패시기에는 0.50, 0.18, 0.37sec로 나타났으며, B선수는 성공시기에 0.52, 0.18, 0.52, 1.68sec로 나타났고, 실패시기에는 0.55, 0.18, 0.45. 0.35로 나타났다. 이러한 결과로 볼 때 실패시기 보다 성공시기에 각 국면별 소요시간이 짧게 나타났으며, B선수의 소요시간 보다는 기록이 높은 A선수의 소요시간이 짧게 나타났다. 2) 피험자들의 성공·실패시기에 따른 ��Jerk) 동작시 각 관절의 각도 중 슬관절 각도는 A선수의 실패시기보다 성공시기에 제 2, 3국면에 1.7, 26.1˚로 각도의 변화가 더 적었으며, B선수는 제 1, 2국면에서 0.6, 5.4˚로 각도의 변화가 적었다. 족관절 각도는 A선수가 실패시기보다 성공시기 제 1, 3국면에서 0.2, 41.2˚로 각도의 변화가 더 적었다. 전경각도는 A선수가 실패시기보다 성공시기 1, 3국면에서 0.2, 7.1˚의 각도가 적게 나타났으며, B선수는 실패시기보다 성공시기에 0.1˚ 더 적게 나타났다. 3) 피험자들의 성공·실패시기에 따른 ��Jerk) 동작시 각 국면별 바벨이동궤적은 성공시기에 A선수의 높이변화가 -13.5, 18.3, 16.1, 28.5cm로 나타났고 실패시기에 -16.4, 20.8, 7.3cm로 나타났으며, 전·후 이동거리 이동은 성공시기에 -1.2, 1.5, -0.6, -26.7로 나타났고 실패시기에는 2.9, 2.2, -1.3으로 나타났다. B선수의 성공시기 높이변화는 -13.6, 24.2, 17.0, 27.6cm로 나타났고 실패시기시 -15.0, 21.5, 12.0, 0.2cm로 나타났으며, 전·후 이동거리는 성공시기에 1.3, -0.3, -4.9, 8.5cm로 나타났고, 실패시기에는 5.1, -0.4, -7.1cm로 나타났다. A·B선수 모두 준비자세(Jerk Start)를 기준으로 수직 및 전·후거리이동이 적은 것으로 나타났으며, B선수보다는 A선수가 수직 및 전·후 이동거리가 적게 나타났다. 이러한 결과를 볼 때 용상종목 ��Jerk) 동작시 각 국면별 소요시간은 정확한 자세에 따라 짧게 실시해야 하며, 각 관절각도 변화는 준비자세(Jerk Start)를 기준으로 각도의 변화가 적어야 하고, 바벨이동궤적 또한 준비자세(Jerk Start)를 기준으로 수직 및 전후거리의 변화가 적어야 한다고 생각된다.
The purpose of this research is to examine the sports scientific difference of the motions between the success and the failure of the jerk motion in the clean and jerk. The target of the research were two persons who participated in the 80th Korea National Athletic Games and won 1st and 2nd place in...
The purpose of this research is to examine the sports scientific difference of the motions between the success and the failure of the jerk motion in the clean and jerk. The target of the research were two persons who participated in the 80th Korea National Athletic Games and won 1st and 2nd place in the normal class, 56kg of weight lifting. I set 3 video cameras in front of the players-front, left, and right angles (45 degrees each)-to film the real playing. The speed of the frame was set at 30frame/sec and the recording began at 4 or 5 seconds before the game to record the entire competition from the beginning to the end. In addition, I could do a 3-dimensional analysis through this process. The result of the research is according to these findings. 1) The required time of the players when they were in the jerk motion: Player 'A' took 0.12, 0.03, 0.37, 1.97seconds during each 1, 2, 3, 4 phases when he succeeded, and 0.50, 0.18, 0.37 seconds when he failed. Player 'B' took 0.52, 0.18, 0.52, 1.68seconds when he succeeded, and 0.55, 0.18, 0.45. 0.35 seconds when he failed. As a result, I could know that the required time was shorter in each phase when they succeeded compared to when they failed, and the required time of player 'A' who had a better record than the player 'B' was shorter than him also. 2) The angle of each joint of the players when they were in the jerk motion was also recorded. When Player 'A' succeeded, the change of the angle of the knee joint was 1.7, 26.1˚ in each 2nd and 3rd phase and this was less than when he failed. Player 'B's change in the angle of the knee joint was 0.6˚ and 5.4˚ in each of the 1st and 2nd phases, so it was less than player 'A'. The change in the angle of the ankle was 0.2, 41.2˚ in the 1st and 3rd phases and this was less then when he failed and when player 'A' cleared. The change in the angle of the shin was less when he failed then when player 'A' cleared as much as 0.2, 7.1˚ in each of the 1st and 3rd phases. Otherwise, in the case of player 'B', the angle was less than when he failed and when he cleared as much as 0.1˚. 3) The change of the trail of barbell when they were in the jerk motion: The change of the level was -13.5, 18.3, 16.1, 28.5cm when player 'A' succeeded, and it was -16.4, 20.8, 7.3cm when he failed. The change of the distance for forward and backward movement of the barbell was -1.2, 1.5, -0.6, -26.7cm when player 'A' succeeded, and it was 2.9, 2.2, -1.3cm when he failed. In the case of player 'B', the change of the level was -13.6, 24.2, 17.0, 27.6cm when he cleared, and it was -15.0, 21.5, 12.0, 0.2cm when he failed. The change of the distance for forward and backward motion of the barbell was 1.3, -0.3, -4.9, 8.5cm when he cleared, and it was 5.1, -0.4, -7.1cm when he failed. For both of the players, the change of the level and the distance for forward and backward movement of the barbell was little from the jerk start. However player A's was less than player 'B'. Considering these results, I think all of the elements-the required time, the angle of each of the joints, and the change of the trail of the barbell - should be decreased in each phase from the jerk start when they were in the jerk motion.
The purpose of this research is to examine the sports scientific difference of the motions between the success and the failure of the jerk motion in the clean and jerk. The target of the research were two persons who participated in the 80th Korea National Athletic Games and won 1st and 2nd place in the normal class, 56kg of weight lifting. I set 3 video cameras in front of the players-front, left, and right angles (45 degrees each)-to film the real playing. The speed of the frame was set at 30frame/sec and the recording began at 4 or 5 seconds before the game to record the entire competition from the beginning to the end. In addition, I could do a 3-dimensional analysis through this process. The result of the research is according to these findings. 1) The required time of the players when they were in the jerk motion: Player 'A' took 0.12, 0.03, 0.37, 1.97seconds during each 1, 2, 3, 4 phases when he succeeded, and 0.50, 0.18, 0.37 seconds when he failed. Player 'B' took 0.52, 0.18, 0.52, 1.68seconds when he succeeded, and 0.55, 0.18, 0.45. 0.35 seconds when he failed. As a result, I could know that the required time was shorter in each phase when they succeeded compared to when they failed, and the required time of player 'A' who had a better record than the player 'B' was shorter than him also. 2) The angle of each joint of the players when they were in the jerk motion was also recorded. When Player 'A' succeeded, the change of the angle of the knee joint was 1.7, 26.1˚ in each 2nd and 3rd phase and this was less than when he failed. Player 'B's change in the angle of the knee joint was 0.6˚ and 5.4˚ in each of the 1st and 2nd phases, so it was less than player 'A'. The change in the angle of the ankle was 0.2, 41.2˚ in the 1st and 3rd phases and this was less then when he failed and when player 'A' cleared. The change in the angle of the shin was less when he failed then when player 'A' cleared as much as 0.2, 7.1˚ in each of the 1st and 3rd phases. Otherwise, in the case of player 'B', the angle was less than when he failed and when he cleared as much as 0.1˚. 3) The change of the trail of barbell when they were in the jerk motion: The change of the level was -13.5, 18.3, 16.1, 28.5cm when player 'A' succeeded, and it was -16.4, 20.8, 7.3cm when he failed. The change of the distance for forward and backward movement of the barbell was -1.2, 1.5, -0.6, -26.7cm when player 'A' succeeded, and it was 2.9, 2.2, -1.3cm when he failed. In the case of player 'B', the change of the level was -13.6, 24.2, 17.0, 27.6cm when he cleared, and it was -15.0, 21.5, 12.0, 0.2cm when he failed. The change of the distance for forward and backward motion of the barbell was 1.3, -0.3, -4.9, 8.5cm when he cleared, and it was 5.1, -0.4, -7.1cm when he failed. For both of the players, the change of the level and the distance for forward and backward movement of the barbell was little from the jerk start. However player A's was less than player 'B'. Considering these results, I think all of the elements-the required time, the angle of each of the joints, and the change of the trail of the barbell - should be decreased in each phase from the jerk start when they were in the jerk motion.
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