A Unique Method for Predicting Cardiorespiratory Fitness Using Rating of Perceived Exertion
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概要
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The purpose of this study was to develop a simple and convenient indirect method for estimating maximal oxygen uptake(V^^・O_<2max>) and oxygen uptake at the anaerobic threshold (V^^・O_<2AT>) by using workrate and a rating of perceived exertion (RPE) during a submaximal graded cycling test (GCT_<submax>). One hundred and fifty-four healthy Japanese men, aged 20 to 64 years, volunteered to participate in the study. The subjects were randomly divided into two groups, a validation(V) group (n=100) and a cross-validation (CV) group (n=54). The V and CV groups performed a maximal cycling test and the GCT_<submax>. The GCT_<submax> was conducted with documentation of three categories (overall, chest, legs) of RPE, up to a rating of 15. Prediction equations of V^^・O_<2max> and V^^・O_<2AT> were developed by multiple regression analysis using data of the V group. The mean V^^・O_<2max> and V^^・O_<2AT> of the V group were 2462 ± 484 ml・min^<-1> and 1349 ± 334 ml・min^<-1> respectively. Correlational analyses indicated that the workrate (W^^・) at which the legs RPE (RPE_<legs>) reached 15 or higher was evaluated first (W^^・_<RPE legs 15>) together with W^^・_<RPE legs 14> both yielded the highest correlation coefficients (r) with V^^・O_<2max>(r=0.781) and V^^・O_<2AT(r=0.790), respectively. The developed prediction equations of V^^・O_<2max> and V^^・O_<2AT> were V^^・O_<2max>(ml・min^<-1>)=1.19W^^・_<RPE legs 15>(kgm・min^<-1>) - 15.84age(yr) + 13.06 weight(kg)+ 1365(R=0.849, SEE=261 ml・min^<-1> V^^・O_<2AT>(ml・min^<-1>)=1.34W^^・_<RPE legs 14>(kgm・min^<-1>)-5.49 age(yr) + 665(R=0.816, SEE=195 ml・min^<-1>) Results of a crossvalidation analysis indicated a similar estimation (r=0.793 and 0.853, and SEE=240 ml・min^<-1> and 183 ml・min^<-1>) compared with the above equations developed from data of the V group. Reliability coefficients of V^^・O_<2max>(r=0.891) and V^^・O_<2AT>(r=0.870) respectively were significant and there was no difference in the mean value between trials 1 and 2. The "RPE method" developed for estimating cardiorespiratory fitness is not only a unique indirect method but also a valid and useful tool in various settings of exercise prescription.
- 日本生理人類学会の論文
著者
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TANAKA Kiyoji
Institute of Health and Sport Sciences, University of Tsukuba
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Okura Tomohiro
Department Of Epidemiology National Institute For Longevity Sciences(nils)
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Tanaka Kiyoji
Institute For Molecular And Cellular Biolog
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