발레 무용수 발목 근력 불균형에 따른 운동 역학적 요인 분석
Analysis of Biomechanical Variables Based on the Imbalance of Ankle Muscle Strength in Ballet Dancers
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[목적] 본 연구의 목적은 발레 무용수의 발목 근육 불균형에 따른 를르베 동작 수행 시 운동 역학적 변인을 분석하는것이다. [방법] 본 연구의 대상자(n=14, 나이: 22.29±1.73세, 신장: 161.4±5.06cm, 체중: 51.88±7.51kg)는 경력 9년의 발레 무용수 14명이다. 동측 근력비는 등속성 측정기(60°/sec)를 이용하여 발목관절의 족저 굴곡과 배측 굴곡의 최대값을 이용하여 정상치에 가까운 그룹(RMIS)과 먼 그룹(RMIS)으로 집단을 구분하였다. 운동 역학적 변인으로는 발목관절모멘트와 지면반력을 측정하였다. 데이터 분석은 SPSS 26.0을 사용하였고 통계적 검증은 독립 t-검정을 사용하였다. [결과] 발레 무용수의 발목관절 근력 불균형에 따른 Z(수직)방향 지면반력은 RMIB군에서 유의하게 낮게 나타났다. 또한, 통계적으로 유의한 차이는 아니었지만 족저굴곡 모멘트는 RMIB군에서 더 낮게 나타났고, Z방향 발목관절 모멘트 발생에서도 유의한 차이가 나타났다. [결론] 발레 무용수가 동작을 수행할 때 지지 다리 측에서 발생한 힘을 효율적으로 활용하기 위해서는 발목 불균형을고려한 훈련이 필요하다.
Abstract
PURPOSE The purpose of this study is to analyze the biomechanical variables involved in ballet dancers’ ankle muscle imbalance when performing relevé movements. METHODS The subjects of this study (n=14, age: 22.29±1.73 years old, height: 161.4±5.06cm, weight: 51.88±7.51kg) were 14 ballet dancers with 9 years of experience. Based on the reciprocal muscle strength ratio, the dancers were divided into the following groups: Close to the normal value (RMIS) and far from the normal value (RMIB) using the maximum values of plantar flexion and dorsiflexion of the ankle joint using an isokinetic measurement equipment (60°/sec). RMIB). The biomechanical variables, namely the ankle joint movement and ground reaction force, were subsequently measured. SPSS 26.0 was used for data analysis and independent t-test was used for statistical verification. RESULTS The ground reaction force in the Z (vertical) direction based on the ankle joint muscle strength imbalance of ballet dancers was significantly lower in the RMIB group. In addition, although it was not a statistically significant difference, the plantar flexion movement was lower in the RMIB group, and there was a significant difference in the generation of ankle joint movement in the Z direction. CONCLUSIONS In conclusion, in order for a ballet dancer to efficiently utilize the force generated from the supporting leg when performing a movement, ankle imbalance must be taken into consideration when training.
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