초등학생의 거리 도전활동 젖혀뛰기(Hang) 및 힛치-킥(Hitck-Kick) 기술의 교수단서 (Teaching cues to the Hang style and Hitck-kick style of the Long Jump Motion in Distance Challenge Activity of Elementary School students)

서지정보

· 발행기관 : 한국체육교육학회
· 수록지 정보 : 한국체육교육학회지 / 16권 / 1호 / 145 ~ 157페이지
· 저자명 : 배성제

초록

본 연구는 수평거리 도전활동인 멀리뛰기 기술 중에서 젖혀뛰기(Hang) 기술과 힛치-킥(hitch-kick) 기술과의 운동학적 변인을 비교 분석하여 효율적인 멀리뛰기 기술 모형을 제시하고자 하였다. 본 연구의 대상자는 과거에 멀리뛰기의 젖혀뛰기와 힛치-킥 기술을 지도 받은 적이 없으며, 두 가지 기술에 숙달되지 않은 초등학교 남학생 30명을 대상으로 1개월 동안두 가지 기술을 연습하여, 젖혀뛰기와 힛치-킥 두 가지 기술에 익숙해진 학생 중에서 구름발이 왼쪽발인 12명을 무작위로선정하였다. 연구 목적을 달성하기 위해 발구름 구간에서의 신체 중심의 이동 및 멀리뛰기 동작 형태를 분석하였으며, 멀리뛰기의 발구름 동작은 DLT를 이용한 3차원 영상 분석법을 이용하였다. 힛치-킥 기술이 젖혀뛰기 기술을 구사할 때보다 구름발 착지와 도약시에 신체 중심의 속도가 빠르게 나타나 멀리뛰기 기록에 긍정적인 영향을 미치는 것으로 나타났다 연구대상자의 동작 범위 내에서 도약 속도가 빠른 힛치-킥 기술이 신체 후경각은 작고, 신체 후경각은 크게 유지하는경향성을 보였다. 따라서 연구 대상자의 동작 범위내에서 구름발이 착지하는 순간에 신체 후경각을 작게 유지하는 것이기록에 긍정적인 영향을 미친다고 할 수 있으며, 신체 후경각을 최소화하는 동작은 발구름 구간 후반기에서 수평 속도의감소율을 줄이는 동작으로 판단된다.

영어초록

When the long jump motion is considered as simple projectile motion, the flight distance is determined by the initial state of athlete's motion which include the takeoff velocity, takeoff angle,angular momentum at the moment of takeoff. However, due to the construction of human body distinctive movement patterns during the run-up, takeoff, flight, and landing phases are evolved.
This study was conducted to investigate the long jump motion in the Hang style and the Hick-kick style of Distance Challenge Activity by performed elementary school students. Twelve elementary school male students were selected as subjects. The long jump motions performed by the subjects were recorded using two 8mm high speed cameras at the nominal speed of 90 frames per second. The Direct Linear Transformation technique was adopted from the beginning of filming to the final stage of data extraction. KWON 3D motion analysis package program was used to compute the 3 Dimensional coordinates, smoothing factor in which lowpass filtering method was used and cutoff frequency was 6.0Hz. The movement patterns during foot touchdown and takeoff for the takeoff phase of long jump motion were related with the biomechanical consideration.
It was found that: The mean takeoff velocity of the subjects at the instant of takeoff was 5.45±0.61m/s in the Hang style and was 5.68±0.31m/s in the Hick-kick style and the mean height of takeoff of the center of gravity at the instant of takeoff was 0.84±0.14m which is equivalent to 54.1±1.9% of the mean height of the subjects in the Hang style and was 0.88±0.19m which is equivalent to 57.5±1.2% of the mean height of the subjects in the Hick-kick style. The mean takeoff angle at the instant of takeoff was 24.4±3.8° in the Hang style and was 21.3±4.9° in the Hick-kick style. Therefore,In order to increase flight distance in the long jump, the Hick-kick style technique named according to the number of in-the-air strides involved perform than the Hang style long jump technique.
Within the limitations of this study it is concluded: In order to increase flight distance the Hick-kick style technique, several conditions must be fullfilled at the instant of takeoff leg touchdown and takeoff during takeoff phase. First, the takeoff velocity should be fast at the instant of takeoff leg touchdown and takeoff. Second, the body C.O.G(Center of Gravity) height should be raised at the instant of takeoff leg touchdown and takeoff. Third, the foot contact time should be shortened during takeoff phase and the takeoff distance should be increased at the of takeoff. Forth, the active landing style described as clawing the ground with the sole of the takeoff foot should be performed during the takeoff leg touchdown and takeoff. Lengthening the takeoff distance while taking a slightly greater takeoff leg knee angle and body lean angle within the range of the subject's motion during the takeoff phase would result in greater flight distance.

참고자료

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