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Methods Comparison: Assessing agreement of physiological parameters obtained from exercise on two different cycle ergometers
Journal article   Peer reviewed

Methods Comparison: Assessing agreement of physiological parameters obtained from exercise on two different cycle ergometers

Jake A. Siedlik, Grant Harrison, Robert Brigman, Zachary A. Graham, Joseph P. Weir, Philip M. Gallagher and John P. Vardiman
Journal of strength and conditioning research, Vol.29(4), pp.1139-1145
04/2015
DOI: https://doi.org/10.1097/JSC.0000000000000205
PMID: 24045634
Web of Science ID: WOS:000352076600037

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Abstract

The purpose of this study was to determine the agreement of physiological parameters measured during exercise testing on 2 devices at established power outputs (POs). Ten trained male cyclists were recruited. The devices used for comparison were the Lode stationary bicycle ergometer (SBE) (Lode Excalibur) and the PowerTap Pro+ (BPT) (Saris Cycling Group) mobile ergometer. The physiological parameters recorded at established PO (50, 100, 150, 200, 250 W) were heart rate (HR), oxygen consumption ((V) over doto(2)), pulmonary ventilation (V-E), blood lactate, and ratings of perceived exertion (RPE). Subjects were randomized once to the SBE and 3 times to a bicycle equipped with a BPT. After 15 minutes of unloaded pedaling, the trial began with 5 minutes of cycling at 50 W. Intensity increased by 50 W every 5 minutes up to 250 W. Physiological measures were recorded at each PO. Bland-Altman plots were constructed including computation of the ratio of half the range of limits of agreement and the mean of the pairwise means along with bivariate regression calculations for analysis of the linear association between device measurements. Moderate to good agreement was found for HR with agreement improving as PO increased. Comparisons of (V) over doto(2) found agreement increased as the PO increased. V-E, RPE, and lactate did not consistently provide similar measures across trials. The level of agreement between HR and (V) over doto(2) when comparing the SBE and BPT suggests that the PowerTap Pro+ is a sufficient tool for estimating PO and associated physiological parameters in the field.

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