Secondary Logo

Journal Logo

DALLECK LANCE C.; KRAVITZ, LEN; ROBERGS, ROBERT A.
Journal of Strength and Conditioning Research: May 2006
ORIGINAL RESEARCH: PDF Only
Free

ABSTRACTThe purpose of this study was to develop an equation to predict JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max 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 JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max: 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 JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max 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 JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max 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): JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max = 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 JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max 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) JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max 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 JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max in non-laboratory-based settings.

The purpose of this study was to develop an equation to predict JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max 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 JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max: 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 JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max 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 JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max 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): JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max = 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 JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max 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) JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max 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 JOURNAL/jscr/04.02/00124278-200605000-00008/ENTITY_OV0312/v/2017-07-20T235323Z/r/image-pngO2max in non-laboratory-based settings.

Address correspondence to Lance C. Dalleck, lcdalleck@newheart.nm.org.

© 2006 National Strength and Conditioning Association