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걷기 운동 시 심박수와 가속도센서를 이용한 VO2max 간접측정법 개발

Estimation of VO2max from walk exercises with heart rate and accelerometer

김경애|박준성|최현민|이병선|정은지|노호성|도형우|홍규석
국민체육진흥공단 한국스포츠과학원 (Korea Institute of Sport Science)|2017.03|체육과학연구 (Korean Journal of Sport Science)|제28권 제1호|pp. 37-48|DOI 10.24985/kjss.2017.28.1.37

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키워드

VO2max가속도계accelerometer심폐지구력cardiorespiratory fitness
주제분류체육

초록

[목적] 본 연구는 20대 남녀를 대상으로 일정속도로 걷기 시 심박수와 가속도센서를 이용하여 신뢰도와 타당도, 경제성이 높은 VO2max 간접측정법을 개발하였다. [방법] 총 107명(남성: 55명, 여성: 52명)의 연구대상자는 신체구성 측정 후 운동부하테스트와 두 번의 1,600 m 걷기(빠르게 걷기, 일정속도 걷기)에 참여하였다. 연구대상자의 연령과 신체적 특성, 그리고 걷기 시 측정된 시간, heart rate (HR), 또는 HR과 activity count per minute (ACM)의 비율(HR/ACM)을 변인으로 회귀분석을 시행하였다. 개발된 추정식의 타당도 검증을 위하여 직접법에 의한 VO2max와 추정식에 의한 VO2max의 상관관계분석과 예측잔차합제곱(predicted residual sum of squares)를 시행하였다. 또한, 직접법에 의한 VO2max와 추정식에 의한 VO2max의 차이를 분석하기 위하여 Bland-Altman plotting과 선형회귀분석을 실시하였다. [결과] 구간별(400 m, 800 m, 1,200 m, 1,600 m) HR/ACM과 걷기시간이 성별, 연령과 함께 직접법에 의한 VO2max와 유의한 상관관계가 나타났다. 모든 구간에서 추정식이 개발되었으나 400m에서만 직접법에 의한 VO2max와 차이가 없었다(R2: 0.675, %SEE: 10.7). VO2max=121.659+6.656×Gender-0.865×Age-9.540×Time-2460.952×HR/ACM (Gender, 0= female, 1=male: Time, hundredth of a minute: HR, heart rate: ACM, activity count per minute). 모든 구간에서 빠르게 걷기보다 일정속도로 걷기 시 운동강도(%HRmax)가 낮게 나타났다. [결론] 따라서 본 연구를 통해 개발된 추정식을 통해 보다 짧은 거리 또는 보다 낮은 강도의 걷기를 통해 20대 성인의 VO2max측정이 가능할 것으로 사료된다.

Abstract

[Purpose] The purpose of this study was to develop the new indirect method assessing maximal oxygen uptake (VO2max) using heart rate (HR) and accelerometer during walk exercise. [Methods] One hundred seven participants (55 male, 52 female) performed a graded exercise test to determine VO2max and two types of 1,600 m walk exercises (fast walk and pace controlled walk). The equations for estimating VO2max was developed by stepwise multiple regression. The validity of developed equations tested through the correlation between measured VO2max and estimated VO2max, was assessed by predicted residual sum of squares, and Bland-Altman plotting. [Results] VO2max was correlated with time, and HR/activity count per minute (ACM) measured in pace controlled walk exercise at all distance (400 m, 800 m, 1,200 m, 1,600 m). The equations were valid significantly and their multiple correlation coefficients or standard estimated error were similar to that Åstrand-Rhyming cycle ergometer test or Rockport 1 mile walk test. Using HR/ACM in pace controlled walk (400 m), it was possible to estimate VO2max (R2: 0.675, %SEE: 10.7). The equation was: VO2max=121.659+6.656×Gender-0.865×Age-9.540×Time-2460.952×HR/ACM (Gender, 0=female, 1=male: Time, hundredth of a minute: HR, heart rate: ACM, activity count per minute). [Conclusion] Estimation equations developed in this study are considered to estimate VO2max through a shorter distance, or a lower intensity of walk exercise. It is required studies to target a wide range of ages or to develop walk test on a lower bpm.

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