Abstract des Autors

This investigation compared estimated and predicted peak oxygen consumption ([latin capital V with dot above]O2peak) and maximal heart rate (HRmax) among the treadmill, cycle ergometer, and elliptical ergometer. Seventeen women (mean ± SE: 21.9 ± 0.3 y) exercised to exhaustion on all modalities. American College of Sports Medicine metabolic equations were used to estimate [latin capital V with dot above]O2peak. Digital displays on the elliptical ergometer were used to estimate [latin capital V with dot above]O2peak. Two individual linear regression methods were used to predict [latin capital V with dot above]O2peak: (a) 2 steady state heart rate (HR) responses up to 85% of age-predicted HRmax and (b) multiple steady state/nonsteady state HR responses up to 85% of age-predicted HRmax. Estimated [latin capital V with dot above]O2peak for the treadmill (46.3 ± 1.3 ml[middle dot]kg-1[middle dot]min-1) and the elliptical ergometer (44.4 ± 1.0 ml[middle dot]kg-1[middle dot]min-1) did not differ. The cycle ergometer estimated [latin capital V with dot above]O2peak (36.5 ± 1.0 ml[middle dot]kg-1[middle dot]min-1) was lower (p < 0.001) than the estimated [latin capital V with dot above]O2peak values for the treadmill and elliptical ergometer. Elliptical ergometer [latin capital V with dot above]O2peak predicted from steady-state (51.4 ± .8 ml[middle dot]kg-1[middle dot]min-1) and steady-state/nonsteady-state (50.3 ± 2.0 ml[middle dot]kg-1[middle dot]min-1) models were higher than estimated elliptical ergometer [latin capital V with dot above]O2peak, p < 0.01. HRmax, and estimates of [latin capital V with dot above]O2peak were similar between the treadmill and elliptical ergometer; thus, crossmodal exercise prescriptions may be generated. The use of digital display estimates of submaximal oxygen uptake for the elliptical ergometer may not be an accurate method for predicting [latin capital V with dot above]O2peak. Health-fitness professionals should use caution when utilizing submaximal elliptical ergometer digital display estimates to predict [latin capital V with dot above]O2peak. Verf.-Referat