Development of a Submaximal Test to Predict Elliptical Cross-Trainer Vo2max

• Autores: Lance C. Dalleck, Len Kravitz, Robert A. Robergs
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 20, Nº. 2, 2006, págs. 278-283
• Idioma: inglés
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• Resumen

  • Dalleck, L.C., L. Kravitz, and R.A. Robergs. Development of a submaximal test to predict elliptical cross-trainer O2max J. Strength Cond. Res. 20(2):278-283. 2006.-The purpose of this study was to develop an equation to predict O2max from a submaximal elliptical cross-trainer test. Fifty-four apparently healthy subjects (25 men and 29 women, mean ± SD age: 29.5 ± 7.1 years, height: 173.3 ± 12.6 cm, weight: 72.3 ± 7.9 kg, percent body fat: 17.3 ± 5.0%, and elliptical cross-trainer O2max: 43.9 ± 7.2 ml·kg?1·min?1) participated in the study and were randomly assigned to an original sample group (n = 40) and a cross-validation group (n = 14). Each subject completed an elliptical cross-trainer submaximal (3 5-minute submaximal stages) and a O2max test on the same day, with a 15-minute rest period in between. Stepwise multiple regression analyses were used to develop an equation for estimating elliptical cross-trainer O2max from the data of the original sample group. The accuracy of the equation was tested by using data from the cross-validation group. Because there was no shrinkage in R2 between the original sample group and the cross-validation group, data were combined in the final prediction equation (R2 = 0.732, standard error of the estimate = 3.91 ml·kg?1·min?1, p < 0.05): O2max = 73.676 + 7.383(gender) ? 0.317(weight) + 0.003957(age·cadence) ? 0.006452(age·heart rate at stage 2). The correlation coefficient between the predicted and measured O2max values was r = 0.86. Dependent t-tests resulted in no significant differences (p > 0.05) between predicted (43.8 ml·kg?1·min?1) and measured (43.9 ml·kg?1·min?1) O2max measurements. Results indicate that the protocol and equation developed in the current study can be used by exercise professionals to provide acceptably accurate estimates of O2max in nonlaboratory-based settings