초등학생의 손가락 길이 비율(2D:4D)에 따른 체격 및 체력비교
The Comparison of Physique, Physical Fitness and O2max According to 2D:4D Digit Ratio of Elementary School Students Applied for Sports Talented Children Program
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초록
본 연구에서는 체육영재선발에 지원한 2~5학년 남녀 초등학생 441명을 대상으로 두 번째 손가락과 네 번째 손가락 비율(2D:4D ratio)에 따른 체격요인(신장, 체중, BMI, 좌고, 흉위, 체지방률), 체력(앉아 농구공던지기, 제자리멀리뛰기, 50m달리기, 사이드스텝테스트, 윗몸일으키기, 하프스쿼트 점프, 앉아 윗몸 앞으로 굽히기, 왕복오래달리기), KOSTASS의 종목적합률, O2max의 차이를 비교하였다. 이를 위하여 남녀 학년별로 2D:4D 비율에 따라 높음(75%이상), 중간(25~75%미만), 낮음(25%미만) 그룹으로 구분한 후 요인별 결과를 비교하였으며 결과는 다음과 같다. 첫째, 남녀간 2D:4D 비율은 통계적으로 유의한 차이는 없었으며, 남학생이 여학생보다 낮은 경향을 보였다. 둘째, 2학년 남학생의 체지방률은 2D:4D 비율에 따라 차이가 있었으며, 4학년 남학생의 좌고, 체중, 흉위, 체지방률, BMI와 5학년 좌고에서 유의한 차이가 있었다. 셋째, 여학생은 모든 체격요인에서 2D:4D 비율에 의한 차이가 없었다. 넷째, 4학년 남학생은 윗몸일으키기, 하프스쿼트 점프, 제자리멀리뛰기, 체전굴에서 2D:4D 비율에 따라 유의한 차이가 있었다. 다섯째, 여학생은 모든 학년에서 2D:4D 비율에 따라 종목적합률의 차이는 없었으며, 남학생은 2학년과 4학년에서 2D:4D 비율에 따른 종목적합률의 차이가 나타났다. 여섯째, 여학생의 2D:4D 비율에 따라 O2max에는 차이가 있었으며, 남학생은 2D:4D 비율과 O2max 간 유의한 부적상관(r=-.217)이 있었다. 이상의 결과에서처럼 일부 항목에서 유의한 차이가 나타났으나 2D:4D 비율에 따른 일관된 성향이나 특징을 관찰할 수 없었다. 따라서 체육영재에 지원하는 남녀 초등학생을 대상으로 2D:4D 비율에 따른 체격 및 체력의 차이가 명확하지 않음에 따라 예측인자 지표로서 2D:4D 관련성을 확인할 수 없음으로 2D:4D 비율이 체육영재 선발에 지원하는 초등학생들에 대한 운동능력을 평가하기 위한 예측지표로서 부적합할 것으로 생각된다.
Abstract
The purpose of this study was to reveal the relationship between 2D:4D digit ratio and physique, physical fitness of 2nd~5th grade elementary school students who applied the selection test for sports talented children program. 441 students took X-ray pictures for 2D:4D digit ratio and participated the several tests including body measurement, basal physical fitness test, sports relevance ratio and GXT for O2max For the comparison, all of participants were divided into three groups according 2D:4D digit ratio(high: over 75%, middle: 25~75%, low: below 25%), and then all results such as physique, fitness and O2max were compared among groups. Results were followed as below: The first, 2D:4D between boy and girl were no significant difference, but there were tendency that boy’s 2D:4D were lower than girl’s. The second, while difference in sitting height, weight, chest circumference, %fat, BMI of 4th grade boy, boy’s %fat of 2nd grade and sitting height of 5th grade boy were different according 2D:4D digit ratio. The third, there were no significant difference in all physique of girl. The fourth, on the comparison of fitness according 2D:4D digit ratio, sit-up, half-squat jump, standing long jump, sit & reach record of 4th grade boy were different significantly. On the other hand, any basal fitness record of all of grade girl was not different significantly according 2D:4D digit ratio, even any tendency was not shown. The fifth, boy’s sports relevance ratio of 2nd and 4th grade were different according 2D:4D digit ratio, but not in girl’s sports relevance ratio. The sixth, while high group of digit ratio in girl showed higher O2max than low group, boy’s O2max had the tendency of negative correlation with 2D:4D digit ratio. However, we didn’t find any consistent distinct feature of 2D:4D ratio suggested by other research works. Therefore, we concluded that 2D:4D digit ratio might have not enough influence to predict physique and fitness ability.
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