태권도 몸통돌려차기 시 무릎관절에 작용하는 전단력에 대한 분석
Analysis of Knee Joint Shear Force During Taekwondo Roundhouse kicking
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초록
본 연구의 목적은 태권도 겨루기선수들이 몸통돌려차기를 수행할 때 무릎관절의 안정성을 유지하기 위해 기능하는 십자인대 및 측부인대에 작용하는 전단력을 역동역학적 기법으로 분석하는 것이다. 연구대상자들은 오른발을 주 사용발로 하는 남, 녀 겨루기선수 각 8명, 총 16명이며, 성별에 따라 두 집단으로 구성하여 연구를 진행한 결과는 다음과 같다. 1. 차는 다리의 무릎관절에 작용하는 전후방향의 전단력에 대하여 전방최대값은 남자집단(.186±.029)이 여자집단(.142±.027)보다 크게 나타났으며(p=.007), 후방최대값은 남자집단(-.437±.088)이 여자집단(-.334±.089)보다 크게 나타났다(p=.015). 또한 값의 범위는 남자집단(.623±.095)이 여자집단(.476±.087)보다 크게 나타났다(p=.007). 2. 버팀다리의 무릎관절에 작용하는 전후방향의 전단력에 대하여 값의 범위에서 남자집단(.517±.047)이 여자집단(.461±.045)보다 크게 나타났다(p=.021). 3. 차는 다리와 버팀다리의 무릎관절에 좌우방향으로 작용하는 전단력에 대하여 좌측최대값은 차는 다리(-.130±.051)가 버팀다리(-.079±.041)보다 크게 나타났으며(p=.006), 값의 범위는 차는 다리(.277±.099)가 버팀다리(.198±.061)보다 크게 나타났다(p=.008).
Abstract
The purpose of this study was to analyze knee joint shear force to predict the possibility of overuse injury on the ligaments which function to maintain the stability of the knee joint during Taekwondo roundhouse kicking. Sixteen Taekwondo sparring athletes who primarily use right leg for roundhouse kick were randomly selected and divided into two groups by sex(8 males and 8 females). The Mann-Whitney U test was performed to verify the difference between the two groups according to sex. Significance level (α) of all the statistical analyzes were set to .05. The results obtained in this study are as follows. 1. The maximum value of the forward shear force on the knee joint of kicking leg was larger (p=.007) in male group (.186±.029) than female group (.142±.027). Maximum value of backward was larger (p=.015) in male group (-.437±.088) than female group (-.334±.089). Also, the range of value was larger (p=.007) in male group (.623±.095) than female group (.476±.087). 2. The range of value of shear force on the knee joint of supporting leg was larger (p=.021) in male group (.517±.047) than female group (.461±.045). 3. The maximum value of the medial side shear force on the knee joint was larger (p=.006) in kicking leg (-.130±.051) than supporting leg (-.079±.041), and the range of value was larger (p=.008) in kicking leg (.277±.099) than supporting leg (.198±.061). 4. The maximum value of the forward shear force on the knee joint was larger (p<.001) in supporting leg (.272±.058) than kicking leg (.164±.035), and the percent time of maximum value of forward was faster (p<.001) in kicking leg (45.1±5.5) than supporting leg (66.1±4.9). Maximum value of backward was larger (p=.001) in kicking leg (-.385±.100) than supporting leg (-.217±.050), and the percent time of maximum value of backward was faster (p<.001) in kicking leg (40.9±11.7) than supporting leg (91.4±14.7).
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