Abstract
The purpose of this study was to assess the validity of predicting maximal oxygen uptake (\(\dot{V}\rm O_2\)max) from sub-maximal \(\dot{V}\rm O_2\) values elicited during perceptually regulated exercise tests of 2- and 4-min duration. Nineteen physically active men and women (age range 19–23 years) volunteered to participate in two graded exercise tests to volitional exhaustion to measure \(\dot{V}\rm O_2\)max (\(\dot{V}\rm O_2\)maxGXT), at the beginning and end of a 2-week period, and four incremental, perceptually regulated tests to predict \(\dot{V}\rm O_2\)max in the intervening period. Effort production tests comprised 2 × 2-min and 2 × 4-min bouts on a cycle ergometer, perceptually regulated at intensities of 9, 11, 13, 15 and 17 on the Borg 6-20 rating of perceived (RPE) scale, in that order. Individual linear relationships between RPE and \(\dot{V}\rm O_2\) for RPE ranges of 9–17, 11–17 and 9–15 were extrapolated to RPE 20 to predict \(\dot{V}\rm O_2\)max. The prediction of \(\dot{V}\rm O_2\)max was not moderated by gender. Although, \(\dot{V}\rm O_2\)max estimated from RPE 9–17 of trial 1 of the 2-min protocol was significantly lower (P < 0.05) than \(\dot{V}\rm O_2\)maxGXT and \(\dot{V}\rm O_2\)max predicted from the 4-min trials, the \(\dot{V}\rm O_2\)max predicted from trial 2 of the 2-min protocol was a more accurate prediction of \(\dot{V}\rm O_2\)maxGXT across all trials. The intraclass correlation coefficient (R) was also higher between \(\dot{V}\rm O_2\)maxGXT and \(\dot{V}\rm O_2\)max predicted from trial 2 of the 2-min protocol compared to both trials in the 4-min protocol (R = 0.95, 0.88 and 0.79, respectively). Similar results were observed for RPE ranges 9–15 and 11–17. Results suggest that a sub-maximal, perceptually guided, graded exercise protocol, particularly of a 2-min duration, provides acceptable estimates of maximal aerobic power, which are not moderated by gender.
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Eston, R.G., Faulkner, J.A., Mason, E.A. et al. The validity of predicting maximal oxygen uptake from perceptually regulated graded exercise tests of different durations. Eur J Appl Physiol 97, 535–541 (2006). https://doi.org/10.1007/s00421-006-0213-x
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DOI: https://doi.org/10.1007/s00421-006-0213-x