Achievement of V[Combining Dot Above]O2max Criteria During a Continuous Graded Exercise Test and a Verification Stage Performed by College Athletes

• Autores: Constance M. Mier, Ryan P. Alexander, Amanda L. Mageean
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 26, Nº. 10, 2012, págs. 2648-2654
• Idioma: inglés
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• Resumen

  • The purpose of this study was to determine the incidence of meeting specific V[Combining Dot Above]O2max criteria and to test the effectiveness of a V[Combining Dot Above]O2max verification stage in college athletes. Thirty-five subjects completed a continuous graded exercise test (GXT) to volitional exhaustion. The frequency of achieving various respiratory exchange ratio (RER) and age-predicted maximum heart rate (HRmax) criteria and a V[Combining Dot Above]O2 plateau within 2 and 2.2 ml·kg-1·min-1 (<2SD of the expected increase in V[Combining Dot Above]O2) were measured and tested against expected frequencies. After 10 minutes of active recovery, 10 subjects who did not demonstrate a plateau completed a verification stage performed at supramaximal intensity. From the GXT, the number of subjects meeting V[Combining Dot Above]O2max plateau was 5 (<=2 ml·kg-1·min-1) and 7 (<=2.2 ml·kg-1·min-1), RER criteria 34 (>=1.05), 32 (>=1.10), and 24 (>=1.15), HRmax criteria, 35 (<85%), 29 (<10 b·min-1) and 9 (HRmax). The V[Combining Dot Above]O2max and HRmax did not differ between GXT and the verification stage (53.6 ± 5.6 vs. 55.5 ± 5.6 ml·kg-1·min-1 and 187 ± 7 vs. 187 ± 6 b·min-1); however, the RER was lower during the verification stage (1.15 ± 0.06 vs. 1.07 ± 0.07, p = 0.004). Six subjects achieved a similar V[Combining Dot Above]O2 (within 2.2 ml·kg-1·min-1), whereas 4 achieved a higher V[Combining Dot Above]O2 compared with the GXT. These data demonstrate that a continuous GXT limits the college athlete's ability to achieve V[Combining Dot Above]O2max plateau and certain RER and HR criteria. The use of a verification stage increases the frequency of V[Combining Dot Above]O2max achievement and may be an effective method to improve the accuracy of V[Combining Dot Above]O2max measurements in college athletes.