Estimation of % V˙ O 2 reserve from heart rate during arm exercise and running

Zinman College for Physical Education and Sport Science, Wingate Institute, Netanya, Israel.
Arbeitsphysiologie (Impact Factor: 2.19). 01/2001; 83(6):545-50. DOI: 10.1007/s004210000308
Source: PubMed


The purpose of the present investigation was to examine the relationship between the percent heart rate reserve (%HRR) in arm exercise and the corresponding percent oxygen uptake (VO2) reserve, and to compare this relationship to that occurring in running. Fourteen male physical education students took part in the study. Each subject performed a maximal running exercise test and a maximal arm cycling test. The subjects also performed three submaximal exercise bouts (in both exercise modes) at 30%, 60% and 80% of their HRR. The subjects were monitored for their heart rate (HR) at rest, maximal HR (HRmax), HR at submaximal work loads. maximal VO2 (VO2max), VO2 at rest and VO2 at submaximal loads. For each subject, load and exercise mode, %HRR and %VO2 reserve were calculated (from HRmax and VO2max as measured during running and arm cycling) and the relationship between the two was evaluated. The main finding of the present investigation is that the prediction of %VO2 reserve in arm cycling from %HRR is grossly overestimated when calculated from HRmax and VO2max measured during running. The prediction is better but still overestimated when calculated from HRmax and VO2max measured during arm cycling. The findings indicate a better prediction of %VO2 reserve from %HRR for running than for arm exercise. These findings should be taken into consideration when prescribing the target HR for arm training.

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    • "While research has demonstrated that HR is a valid tool to prescribe exercise intensity for lower-body exercise, very few studies have investigated the HR-V ˙ O 2 relationship for upperbody exercise. In fact, to the best of our knowledge, only one previous study has investigated the relationship between %HRR and %V ˙ O 2R during upper-body exercise (Rotstein and Meckel, 2000). Their results showed that predictions of %V ˙ O 2R from %HRR obtained during seated arm-cycling exercise were overestimated. "
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    ABSTRACT: Previous studies have demonstrated that during lower-body exercise the percentage of heart rate reserve (%HRR) is equivalent to the percentage of the oxygen consumption reserve (%V˙O(2R)) but not to a percentage of the peak oxygen consumption (%V˙O(2peak)). The current study examined these relationships in trained surfboard riders (surfers) during upper-body exercise. Thirteen well-trained competitive surfers performed a stepwise, incremental, prone arm-paddling exercise test to exhaustion. For each subject, data obtained at the end of each stage (i.e., HR and V˙O(2) values) were expressed as a percentage of HRR, V˙O(2peak), and V˙O(2R) respectively and used to determine the individual %HRR-%V˙O(2peak) and %HRR-%V˙O(2R) relationships. Mean slope and intercept were calculated and compared with the line of identity (slope=1, intercept=0). The %HRR versus %V˙O(2R) regression mean slope (0.88±0.06) and intercept (20.82±4.57) were significantly different (p<0.05) from 1 and 0, respectively. Similarly, the regression of %HRR versus %V˙O(2peak) resulted in a line that differed in the slope (p<0.05) but not in the intercept (p=0.94) from the line of identity. Predicted values of %HRR were significantly higher (p<0.05) from indicated values of %V˙O(2R) for all the intensities ranging from 35% to 95% V˙O(2R). Unlike results found for lower-body exercise, a given %HRR during prone upper-body exercise was not equivalent to its corresponding %V˙O(2R). Thus, to ensure more targeted exercise intensity during arm-paddling exercise, individual HR-V˙O(2) equations should be used.
    Journal of PHYSIOLOGICAL ANTHROPOLOGY 11/2010; 29(6):189-95. DOI:10.2114/jpa2.29.189 · 1.27 Impact Factor
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    ABSTRACT: The aim of this study was to compare the growth factors (testosterone, growth hormone, insulin growth factor and insulin growth factor binding protein-3) concentration s and physiological responses during eccentric and concentric muscle contractions in strength trained athletes. A group of nine subjects performed an incremental exercise test requiring con- centric and eccentric muscle contractions. Serum growth hormone (GH), insulin-like growth factor (IGF-I) and insulin-like growth factor binding protein-3 (IGFBP -3) were assessed, before and after both types of exer - cise. The concentrations of IGF-I and GH tended to be higher during ex- ercise than at rest and reached the level of statistical significance at maximal exercise intensity (p
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