The development of rating of perceived exertion-based tests of physical working capacity

• Autores: Michelle Mielke, Terry J. Housh, Moh H. Malek, Travis W. Beck, Richard J. Schmidt, Glen O. Johnson
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 22, Nº. 1, 2008, págs. 293-302
• Idioma: inglés
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• Resumen

  • The purpose of the present study was to use ratings of perceived exertion (RPE) from the Borg (6-20) and OMNI-Leg (0-10) scales to determine the Physical Working Capacity at the Borg and OMNI thresholds (PWCBORG and PWCOMNI). PWCBORG and PWCOMNI were compared with other fatigue thresholds determined from the measurement of heart rate (the Physical Working Capacity at the Heart Rate Threshold: PWCHRT), and oxygen consumption (the Physical Working Capacity at the Oxygen Consumption Threshold, PWC[latin capital V with dot above]O2), as well as the ventilatory threshold (VT). Fifteen men and women volunteers (mean age +/- SD = 22 +/- 1 years) performed an incremental test to exhaustion on an electronically braked ergometer for the determination of [latin capital V with dot above]O2 peak and VT. The subjects also performed 4 randomly ordered workbouts to exhaustion at different power outputs (ranging from 60 to 206W) for the determination of PWCBORG, PWCOMNI, PWCHRT, and PWC[latin capital V with dot above]O2 The results indicated that there were no significant mean differences among the fatigue thresholds: PWCBORG (mean +/- SD = 133 +/- 37W; 67 +/- 8% of [latin capital V with dot above]O2 peak), PWCOMNI (137 +/- 44W; 68 +/- 9% of [latin capital V with dot above]O2 peak), PWCHRT (135 +/- 36W; 68 +/- 8% of [latin capital V with dot above]O2 peak), PWC[latin capital V with dot above]O2(145 +/- 41W; 72 +/- 7% of [latin capital V with dot above]O2 peak) and VT (131 +/- 45W; 66 +/- 8% of [latin capital V with dot above]O2 peak). The results of this study indicated that the mathematical model used to estimate PWCHRT and PWC[latin capital V with dot above]O2 can be applied to ratings of perceived exertion to determine PWCBORG and PWCOMNI during cycle ergometry. Salient features of the PWCBORG and PWCOMNI tests are that they are simple to administer and require the use of only an RPE scale, a stopwatch, and a cycle ergometer. Furthermore, the power outputs at the PWCBORG and PWCOMNI may be useful to estimate the VT noninvasively and without the need for expired gas analysis.