초록
야구 경기에서 투수의 투구 동작은 5단계로 구분되어 정의되지만 투구 속도는 어느 부위의 근력에 의해서 좌우되는지 단언할 수 없다. 그러나 최근에 견관절의 회전력 중요성이 강조되고 있으며 몇몇 선행 연구를 찾아 볼 수 있었다. 그래서 빠른 투구 능력과 견관절 회전력에 대한 상관성 분석의 필요성을 갖게 되었다. 따라서 본 연구의 목적은 오버 드로우 투수들의 견관절 내 외측 토크를 3가지 자세에서 측정하여 볼 속도와 관계를 규명하고 기준을 제시할 기초 자료 제공에 있다. 연구 결과 앉은 자세에서 내 외전 최대 토크는 집단 (볼 속도 차이) 간 유의한 차이가 나타나지 않았으며, 누운 자세의 내 외전 최대 토크는 집단간 유의한 차이가 나타나지 않았으며, 선 자세에서도 동일한 결과가 나타났다. 결론적으로 투구 속도와 자세별 내 외전 최대 토크 근력과는 정량적인 차이는 있었지만 상관성은 나타나지 않았다. 그래서 투구 속도에 영향을 미치는 역학적 에너지 동원 체계에 대한 기전 규명의 추후 연구가 기대된다.
The purpose of this study was analysis inter relative the ball velocity and isotonic torque of shoulder joint. The subject were twelve overthrow pitcher of professional baseball player. The measurement was used Cybex 6000. The results of this study were as follows : 1. As the siting position of maximal adduction torque of dominant, A group was higher than B group. As the non-dominant, B group was higher than A group for improved angular velocity. There is no significance difference between group. 2. As the siting position of maximal abduction torque of dominant and non-dominant, B group was higher than A group for all measurement. There is no significance difference between group. 3. As the layed position of maximal internal torque of dominant, A group was higher than B group. As the non-dominant was just higher at $180_{\circ}$/sec than B group, B group was higher at $60_{\circ}$/sec and $300_{\circ}$/sec than A group. There is no significance difference between group. 4. As the layed position of maximal external torque of dominant and non-dominant, A group was more higher than B group for all measurement. There is no significance difference between group. 5. As the standing position of maximal internal torque of dominant, A group was just higher at $60_{\circ}$/sec than B group, B group was higher at $180_{\circ}$/sec and $300_{\circ}$/sec than A group. As the non-dominant, B group was higher than A group. There is no significance difference between group. 6. As the standing position of maximal external torque of dominant, A group was higher $60_{\circ}$/sec and $180_{\circ}$/sec than B group. But B group was higher $300_{\circ}$/sec than A group. As the non-dominant, B group was higher than A group. There is no significance difference between group.