태권도 몸통지르기 시 머리로 전달되는 충격 쇼크 성분의 주파수 스펙트럼
Spectral Analysis of Shock Frequency Components During Taekwondo Momtong-Jireugi
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초록
본 연구는 기술연구로서 태권도 몸통지르기 시 머리로 전달되는 충격가속도와 충격 쇼크 성분의 주파수 스펙트럼을 분석하고 이와 관련된 후행 연구를 위한 기초자료를 제공하는 것에 그 목적이 있다. 연구를 위해 K대학교 태권도 학과에 재학 중이며 오른손잡이인 엘리트 남자 품새선수 9명을 유층표집하였다. 머리의 진동과 충격을 측정한 센서는 ±50g의 측정범위를 가진 3축 가속도 센서(Kistler Type 8766A)이며, 6250Hz의 sampling rate로 이마의 가운데에서 가속도 데이터를 수집하였다. 분석을 위해 데이터가 수집된 구간은 오른주먹이 움직이는 순간부터 지르기 동작을 완료한 순간까지이며 그 결과, 최대 충격가속도(g)는 좌우축(x) (+)방향: 3.35 ± 1.779, (-)방향: -3.75 ± 2.317, 전후축(y) (+)방향: 1.54 ± 0.417, (-)방향: -1.05 ± 0.374, 종축(z) (+)방향: 4.30 ± 1.238, (-)방향: -4.42 ± 1.272, resultant: 5.75 ± 1.719로 나타났다. 고주파영역(10Hz ~ 20Hz)에 대한 신호파워의 적분크기(g2/Hz)는 좌우축(x): 0.453 ± 0.3519, 전후축(y): 0.045 ± 0.0220, 종축(z): 0.591 ± 0.2576, resultant: 0.160 ± 0.0928이었으며, 고주파영역에서 최대파워가 발생하는 주파수 성분(Hz)은 좌우축(x): 13.5 ± 3.26, 전후축(y): 13.8 ± 3.44, 종축(z): 16.9 ± 2.08, resultant: 23.6 ± 13.05으로 나타났다.
Abstract
The purpose of this study was to analyze the peak acceleration and shock frequency components spectrum delivered to the head during taekwondo momtong-jiruegi and to provide basic data for subsequent studies. Nine elite male poomsae players, who are currently enrolled in the Taekwondo Department at K University, were collected by stratified sampling. The acceleration sensor that measured the vibration and shock of the head was Kistler Type 8766A which has ±50g capacity for 3-axis. Sampling rate was 6250Hz. Data collected for analysis ranged from the moment the right fist moved to the moment of completion of the movement. The result of peak acceleration of mediolateral axis (+) direction: 3.35±1.779, (-) direction: -3.75±2.317, anteroposterior axis (+) direction: 1.54±0.417, (-) direction: -1.05±0.374, longitudinal axis (+) direction: 4.30±1.238, (-) direction: -4.42±1.272, and resultant: 5.75±1.719. The result of Integral size of signal power (g2/Hz) for high frequency range (10~20Hz) of mediolateral axis: 0.453±0.3519, anteroposterior axis: 0.045±0.0220, longitudinal axis: 0.591±0.2576, and resultant: 0.160±0.0928. The result of Frequency component where maximum power occurs in high frequency range (Hz) of mediolateral axis: 13.5±3.26, anteroposterior axis: 13.8±3.44, longitudinal axis: 16.9±2.08, and resultant: 23.6±13.05.
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