삼축가속도계를 활용한 알파인 스키 선수의 전지훈련 모니터링
Field Training Monitoring of Alpine Ski Athletes Using a Triaxial Accelerometers
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[목적] 삼축가속도계를 이용한 알파인 스키 전지훈련 모니터링을 통해 정량적 자료를 기반의 훈련 평가 방법을 제안하고자한다. [방법] 프랑스(남자4명, 여자2명)와 뉴질랜드(남자4명, 여자2명)의 전지훈련에 참가한 총 12명의 우리나라 알파인스키선수를 대상으로 전지훈련 동안 Actigraph GT9X를 착용하여 훈련, 일상생활동안의 활동정보를 수집하였으며 총 7일의자료를 활용하였다. 수집 된 자료는 ActiLife Ver 6.13.1를 통해 다운로드 받아 Freedson(2011)으로 에너지소비량을 산출하고 Harris & Benedict(1918)공식을 통한 휴식대사량으로 보정하였으며, Freedson(1998) 신체활동 강도 분류기준과 Freedson(1998) METs공식을 이용하여 시간별 활동 강도를 구분하였다. 자료처리는 Window Excel 2016로 날짜, 시간, 강도, 에너지소비량에 따라 정리하고 Windows SPSS 23을 사용한 종속표본 t-test를 통해 주중과 주말, 훈련내용에 따른 차이를 분석했으며 유의수준은 ɑ=.05로 설정하였다. [결과] 첫째, 프랑스와 뉴질랜드 모두 계획된 스키훈련 및 대회 시간 동안 고강도의 활동이 짧은 시간동안 나타났다가 사라지는 형태가 반복적으로 이루어지고 있었다. 둘째, 중강도 이상 활동은 훈련 내용에 따라 일별로 다소 차이가 있었지만6~10% 내외의 비율을 차지하고 있었으며 주당 총 중강도 이상 활동 시간과 강도가 매우 높았다. 셋째, 훈련내용에 따라프랑스 주중·주말의 총 에너지소비량(p<.05), 주중·주말 스키훈련(p<.05)과 체력훈련(p<.05)의 에너지소비량에 차이가있었고, 뉴질랜드는 주중·주말의 총 에너지소비량에서 차이가 나타났다(p<.05). [결론] 정량적 측정을 통한 훈련평가 결과를 활용하여 적절한 휴식 및 운동 강도를 유지할 수 있는 알파인 스키선수들을위한 체계적인 훈련 프로그램을 개발할 필요성이 있을 것으로 사료된다.
Abstract
PURPOSE This study was designed to propose a quantitative base training evaluation method through alpine ski training monitoring using a triaxial accelerometer. METHODS Twelve Korean alpine ski athletes, six each in France and New Zealand, participated in this study. Activity data during training and daily living were collected for 7 days via the Actigraph GT9X. The collected data were downloaded through ActiLife Ver 6.13.1. Energy expenditure was calculated with Freedson (2011), and the resting metabolic rate was corrected using the Harris & Benedict (1918) formula. Further, the physical activity intensity classification criteria and METs formula of Freedson (1998) were used to classify hourly activity intensity. The collected data were organized by date, time, intensity, and energy expenditure using Microsoft Excel 2016. Differences between weekdays vs. weekends and skiing vs. physical training were analyzed through a paired sample t-test using Windows SPSS 23 with a significance level of a=.05. RESULTS First, both groups showed repetitive on and off high-intensity activities during scheduled ski training and competition. Second, moderate-intensity activities accounted for an average of 6-10%, and the weekly total time and intensity of MVPA was very high. Finally, the group from France showed differences in total energy expenditure during weekdays vs. weekends (p<.05) and the energy expenditure of both ski training and physical training during weekdays vs. weekends (p<.05). The New Zealand group showed a difference in total energy consumption during weekdays vs. weekends (p<.05). CONCLUSIONS A systematic training program based on quantitative training evaluation should be developed for alpine ski athletes to maintain proper rest and exercise intensity levels.
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