Prediction of Maximal Vo2 from a Submaximal StairMaster Test in Young Women

• Autores: Jane L. P. Roy, Joe F. Smith, Phillip A. Bishop, Chris Hallinan, Min Qi Wang, Gary R. Hunter
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 18, Nº. 1, 2004, págs. 92-96
• Idioma: inglés
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• Dialnet Métricas: 1 Cita
• Resumen

  • The StairMaster 4000 PT is a popular step ergometer which provides a submaximal test protocol (SM PredictedVÿ O2max) for the prediction ofVÿ O2max (ml·kg21·min21).

    The purpose of this study was to evaluate the SM Predicted Vÿ O2max protocol by comparing it to results from aVÿ O2max treadmill test in 20 young healthy women aged 20�25 years. Subjects were 10 step-trained (ST) women who had performed aerobic activities and exercised on a step ergometer for 20�30 minutes at least 3 times per week for the past 3 months, and 10 non� step-trained (NST) women who had performed aerobic activities no more than twice a week during the past 3 months and had no previous experience on a step ergometer. The SM Predicted Vÿ O2max protocol used 2 steady state heart rates between approximately 115�150 b·min21 to estimate Vÿ O2max. The Bruce maximal treadmill protocol (Actual Vÿ O2max) was used to measureV ÿ O2max by open circuit spirometry. Each subject performed both tests within a 7-day period. The means and standard deviations for the Actual Vÿ O2max tests were 39.8 6 6.1 ml·kg21·min21 for the ST group, 37.6 6 6.3 ml·kg21·min21 for the NST group, and 38.7 6 6.2 ml·kg21·min21 for the Total group (N 5 20); and for the SM Predicted Vÿ O2max tests, means and standard deviations were 40.78 6 14.0 ml·kg21·min21, 30.9 6 4.8 ml·kg21·min21 and 35.9 6 11.4 ml·kg21·min21. There was no significant difference (p . 0.05) between the means of the Actual Vÿ O2max and SM Predicted Vÿ O2max test for the Total group (N 5 20) or the ST group (n 5 10), but a significant difference (p , 0.05) was shown for the NST group. The coefficient of determination (R2) and standard error of estimate (SEE) for the SM PredictedVÿ O2max and ActualVÿ O2max tests were R2 5 0.18, SEE 5 5.72 ml·kg21·min21 for the Total group; R2 5 0.00, SEE 5 6.68 ml·kg21·min21 for the NST group; and R2 5 0.33, SEE 5 5.32 ml·kg21·min21 for ST group. In conclusion, the SM Predicted Vÿ O2max test has acceptable accuracy for the ST group, but significantly underpredicted the NST group by almost 7 ml; and, as demonstrated by the high SEEs, it has a low level of precision for both ST and NST subjects.