남성의 연령에 따른 최대산소섭취량 예측을 위한 사이클 에르고미터 검사와 20m 셔틀런 검사의 준거타당도
Validity of Cycle Ergometer Test and 20m-MST for Predicting VO2max of Men according Age
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[서론] 최대산소섭취량을 측정하는 방법은 다양하지만 연령에 따라 최대산소섭취량은 감소하므로 연령변화에 따른 측정의 오차가 발생하게 된다. 이 연구는 연령에 따른 최대산소섭취량의 변화를 살펴보고, 최대산소섭취량 예측을 위한 최대하부하검사인 사이클 에르고미터 검사와 필드검사인 20m 멀티 셔틀런 검사의 추정방법 타당성과 최대산소섭취량과의 상관관계를 알아보고 오차에 영향을 주는 요인을 분석하고자 하였다. [방법] 이 연구는 지역광고를 통하여 자발적으로 참여에 동의한 지원자 남자 125명을 대상으로 측정하였다. 최대산소섭취량의 직접측정은 점진적인 트레드밀 운동부하검사(GXT)를 통해 측정하였으며, 최대하 사이클에르고미터 검사(AST)와 20m 멀티 셔틀런 검사(20m-MST)를 통해 최대산소섭취량을 산출하여 추정하였다. 연령에 따른 차이는 일원변량분석을 이용하여 분석하였으며, 측정 간 차이는 반복측정 이원변량분석으로 분석하였다. 측정값의 상관관계는 pearson correlation을 이용하였고, 회귀분석을 실시하였다. 또한 검사의 일치도는 Bland-Altman분석과 급내상관계수로 분석하였다. [결과] 최대산소섭취량은 연령에 따른 차이를 나타냈으며, 20대가 다른 연령보다 가장 높고, 30대와 40대가 60대보다 높은 것으로 나타났다. 직접 측정한 최대산소섭취량과 간접 측정을 통하여 추정된 최대산소섭취량은 60대를 제외한 모든 연령에서 차이를 나타내었다. GXT 측정값에 비하여 AST 추정값과 20m-MST 추정값은 과소 추정하는 것으로 나타났으며, GXT 측정값과 20m-MST 추정값의 차이는 연령(p<.01), 체중(p<.01), 체질량지수(p<.001) 및 체지방율(p<.001)에 영향을 받는 것으로 나타났다. 또한, 20m-MST 추정값의 차이값은 AST 추정값의 차이값보다 높은 내적 신뢰도를 나타내었다. [결론] 따라서, 남성의 연령에 따른 최대산소섭취량 예측을 위한 검사방법으로 20m-MST 검사방법이 AST 검사방법보다 더 신뢰도가 높은 것으로 나타났다.
Abstract
[INTRODUCTION] Despite the various cardiorespiratory fitness assessments, VO2max decreases progressively with age. Therefore, there were reports in that the error of measurement was increased. This investigation compared the results of direct and indirect measurements of VO2max of men according age. [METHOD] Healthy 125 men were recruited for this study. Direct estimation of cardiorespiratory endurance (VO2max) comprised graded treadmill exercise test (GXT) followed by expired gas analysis. VO2max was indirectly predicted by Astrand submaximal cycle ergometry test (AST) and 20m multistage shuttle run test (20m-MST). To evaluate differences according age, One-way ANOVA was used. Two-way repeated ANOVA was applied to detect significant differences among the three measurements. Associations among the parameters investigated were analyzed with Pearson correlation and linear regression was used for analyses of relationships among variables. The accuracy of measurements was assessed by Bland-Altman and interclass correlation coefficient analysis. [RESULT] VO2max, which there was a differences in age, in 20s was higher than in other age groups, and 30s or 40s were higher than in 60s. The measurement of GXT showed a significant difference in ages, except in 60s, from the estimates of AST and 20m-MST. Both estimated VO2max of AST and 20m-MST were found underestimated. The measurements of GXT had a low correlation with the estimates of AST and 20m-MST. The error between estimated of 20-MST and measured of GXT values was affected by age (p<.01), weight (p<.01), body mass index (BMI) (p<.001), and percentage of body fat (p<.001) respectively. Moreover, the reliability of 20m-MST was higher than AST. [CONCLUSION] Therefore, 20m-MST is more valid method to evaluate VO2max than AST for men.
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