Net Heart Rate for Estimating Oxygen Consumption in Active Adults

被引:1
作者
Bragada, Jose A. [1 ,2 ]
Magalhaes, Pedro M. [1 ,2 ]
Sao-Pedro, Eric [1 ]
Bartolomeu, Raul F. [1 ,3 ,4 ]
Morais, Jorge E. [1 ,2 ]
机构
[1] Inst Politecn Braganca, Dept Sport Sci, P-5300252 Braganca, Portugal
[2] Inst Politecn Braganca, Res Ctr Act Living & Wellbeing LiveWell, P-5300252 Braganca, Portugal
[3] Polytech Guarda, Dept Sport Sci, P-6300559 Guarda, Portugal
[4] Sport Phys Act & Hlth Res & Innovat Ctr SPRINT, P-2040413 Rio Maior, Portugal
关键词
net heart rate; oxygen consumption; walk; run; cycling; StepTest4all; ENERGY-EXPENDITURE; EXERCISE; PREDICTION; VALIDATION; FITNESS; TIME;
D O I
10.3390/jfmk9020066
中图分类号
G8 [体育];
学科分类号
04 ; 0403 ;
摘要
The aim of this study was to verify the accuracy of predicting oxygen consumption (O-2) in predominantly aerobic activities based on net heart rate (netHR), sex, and body mass index (BMI) in active adults. NetHR is the value of the difference between the resting HR (HRrest) and the average HR value obtained during a given session or period of physical activity. These activities must be continuous, submaximal, and of a stabilized intensity. The magnitude of the netHR depends mainly on the intensity of the exercise. The HR is measured in beats per minute (bpm). A total of 156 participants, 52 women and 104 men, between the ages of 18 and 81, had their netHR and net oxygen intake (netVO(2)) assessed. There were 79 participants in group 1 (prediction sample) (52 males and 27 females). There were 77 people in group 2 (validation sample) (52 males and 25 females). The results of the multiple linear regression showed that netVO(2) (R-2 = 85.2%, SEE = 3.38) could be significantly predicted by sex (p < 0.001), netHR (p < 0.001), and BMI (p < 0.001). The Bland-Altman plots satisfied the agreement requirements, and the comparison of the measured and estimated netVO(2) revealed non-significant differences with a trivial effect size. We calculated the formula NetVO(2) (mL/(kg<middle dot>min)) = 16 + 3.67 (sex) + 0.27 (netHR) - 0.57 (BMI) to predict netVO(2), where netVO(2) is the amount of oxygen uptake (mL/(kg<middle dot>min)) above the resting value, netHR is the heart rate (beats per minute) above the resting value measured during exercise, sex is equal to zero for women and one for men, and BMI is the body mass index. In addition, based on the knowledge of VO2, it was possible to estimate the energy expenditure from a particular training session, and to determine or prescribe the exercise intensity in MET (metabolic equivalent of task).
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页数:10
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