중학교 남자 투창선수들의 기록수준별 창던지기 동작의 운동학적 특성 = Kinematic Characteristics of Javelin Throw by Record Levels in Middle School Male Athletes

다국어 초록 (Multilingual Abstract)

The purpose of this study was to analyze the kinematic characteristics of javelin throw by record level in middle school male athletes. To accomplish these purpose, we filmed javelin throwing event in the 47th National Junior Sports Festival using two cameras, divided 16-athletes into two groups(higher rank group, lower rank group) by record level, and fulfilled 3-D motion analysis. To verify statistical significance between two groups by record level, t-test was conducted using SPSS 20(p<.05).
As a result, higher rank group of 8 athletes showed higher values in release velocity, stride length, knee angle at release than lower rank group(p<.05). On the other hands, Attack angle and attitude angle of javelin was smaller(p<.05). In coefficient of variation, attack angle of javelin, javelin grip distance (release to foul line), vertical velocity change volume of center of gravity was higher values.
After all, to develop record of middle school male athletes they should maintain consistency of movement and make lower attitude angle of javelin, make longer last stride length and extend knee angle maximally at support’s foot ground contact.

국문 초록 (Abstract)

본 연구는 중학교 남자 투창 선수들의 기록수준별 창던지기 동작에 대한 운동학적 분석을 통하여 기록에 영향을 미치는 요인을 규명하고자 하였다. 이러한 목적을 달성하기 위하여 제 47회 전국소년체육대회에 참여한 중학교 남자 선수들이 수행한 창던지기 종목을 2대의 비디오카메라로 촬영 후 결선에 진출한 선수 8명과 결선에 진출하기 못한 선수 8명에 대하여 3차원 동작 분석을 실시하였다. 기록 수준에 따른 운동학적 변인 차이를 규명하기 위하여 SPSS 20을 이용하여 독립 t 검증을 실시하였다(p<.05). 그 결과 결선진출 집단이 결선미진출 집단에 비해 투사속도, 스트라이드길이, 릴리즈 시 무릎각도에서 크게 나타났고, 공격각과 창의 자세각에서는 작게 나타났다(p<.05).
창의 공격각도, 릴리즈 시 창그립과 파울라인 거리, 무게중심의 수직속도 변화에서 변동계수가 크게 나타났다. 이러한 결과를 요약하면 중학교 남자 선수들의 기록 향상을 위해서는 동작의 일관성을 유지하면서 마지막 스트라이드 길이를 길게 하고 지지발 착지 시 무릎각을 최대로 신전시키면서 창의 자세각을 낮추어야 한다.

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