휠체어 트레드밀 운동 시 심박수를 이용한 에너지 소비량 추정
Prediction of Energy Expenditure Based on Heart Rate during Wheelchair Treadmill Exercise
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초록
본 연구는 휠체어 트레드밀 점증부하 운동 시의 심박수를 이용하여 에너지소비량 회귀모형을 도출하여, 휠체어 운동을 실시할 때의 에너지소비량 추정식을 제시하고자 하는 데 그 목적이 있었다. 본 연구의 피험자는 휠체어 주행 연습을 주 3회, 회당 30분씩, 4주간 실시한 대학생 남성 36명, 여성 23명으로 구성되었으며, 휠체어 운동부하검사(평균 12분 51.93초) 동안 컴퓨터를 통하여 매 2∼3초마다 1회의 측정 요소를 기록하여, 각 피험자 마다 최소 300회 이상의 심박수와 에너지소비량이 측정되었다. 이를 통하여 본 연구에서 사용된 총 사례수는남성 14,641회, 여성 7,985회이었다. 연구결과, 심박수와 에너지소비량과의 상관계수는 남성 r=0.898, 여성r=0.775로 나타났으며, 연령, 신장, 체중, 심박수를 이용한 회귀식은 남성 에너지소비량(kcal/min)=0.045×연령(years)+0.043×신장(cm)+0.048×체중(kg)+0.111×심박수(beats/min)-18.290 (R²=82.7%); 여성 에너지소비량(kcal/min)=-0.209×연령(years)+0.081×신장(cm)+0.050×체중(kg)+0.057×심박수(beats/min)-14.603 (R²=70.3%)으로 나타났다. 또한, 심박수만을 이용한 회귀식은 남성 에너지소비량(kcal/min)=0.111×심박수(beats/min)-6.565 (R²=80.7%); 여성 에너지소비량(kcal/min)=0.057×심박수(beats/min)-2.958 (R²=60.1%)으로 나타났다. 결과에서 제시한 회귀식들은 결정계수(R²)가 모두 60%이상으로 나타나, 심박수를 이용한 에너지소비량 추정 공식으로써 모두 적합한 것으로 판단된다. 다만, 남성의 경우 심박수 한 변인만을 사용하여 에너지소비량을 추정하여도 무방하나, 여성의 경우 보다 정확한 에너지소비량 추정을 위하여 연령, 신장, 체중, 심박수의 모든 변인을 사용할 것을 권장한다.
Abstract
The purpose of this study was to predict energy expenditure based on heart rate during wheelchair treadmill exercise and to provide predictive formula to be used in field, not laboratory. Participants were 36 men and 23 women in college. The heart rate was measured at every 2-3 seconds using computer during wheelchair graded exercise test(average 12min 51.93sec); so, each participant's heart rate and energy expenditure were measured at least 300 times. Total cases used in this study was 14,641 times of male and 7,985 times of female. As a result of this study, Pearson correlation coefficient of heart rate and energy expenditure was r=0.898 in male and r=0.775 in female; also, prediction equation using age, height, weight,and heart rate was as following:male energy expenditure(kcal/min)=0.045 × age(years) + 0.043 × height(cm) + 0.048 × weight(kg)+ 0.111 × heart rate(beats/min) - 18.290 (R²=82.7%);female energy expenditure(kcal/min)=-0.209 × age(years) + 0.081 × height(cm) + 0.050 × weight(kg)+ 0.057 × heart rate(beats/min) - 14.603 (R²=70.3%). The prediction equation using only heart rate was as following:male energy expenditure(kcal/min)=0.111 × heart rate(beats/min) - 6.565 (R²=80.7%);female energy expenditure(kcal/min)=0.057 × heart rate(beats/min) - 2.958 (R²=60.1%)All R² of prediction equations suggested in result were over 60% which is thought to be proper to predict energy expenditure using heart rate. It is fine to predict energy expenditure using heart rate only in man, but it is recommended to use all variables(age, height, weight, heart rate) in using for woman.
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