Validity and Reliability of the Wattbike cycle ergometer

Hopker, James G. and Jobson, Simon A. and Myres, S. and Passfield, Louis and Bruce, W. (2010) Validity and Reliability of the Wattbike cycle ergometer. International Journal of Sports Medicine, 31 (10). pp. 731-736. ISSN 0172-4622. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1055/s-0030-1261968

Abstract

The purpose of this study was to assess the validity and reliability of the Wattbike cycle ergometer against the SRM Powermeter using a dynamic calibration rig (CALRIG) and trained and untrained human participants. Using the CALRIG power outputs of 50–1 250 W were assessed at cadences of 70 and 90rev.min−1. Validity and reliability data were also obtained from 3 repeated trials in both trained and untrained populations. 4 work rates were used during each trial ranging from 50–300 W. CALRIG data demonstrated significant differences (P < 0.05) between SRM and Wattbike across the work rates at both cadences. Significant differences existed in recorded power outputs from the SRM and Wattbike during steady state trials (power outputs 50–300W) in both human populations (156 ± 72 W vs. 153 ± 64 W for SRM and Wattbike respectively; P < 0.05). The reliability (CV) of the Wattbike in the untrained population was 6.7 % (95 %CI 4.8–13.2 %) compared to 2.2 % with the SRM (95 %CI 1.5–4.1 %). In the trained population the Wattbike CV was 2.6 % (95 %CI 1.8–5.1 %) compared to 1.1 % with the SRM (95 %CI 0.7–2.0 %). These results suggest that when compared to the SRM, the Wattbike has acceptable accuracy. Reliability data suggest coaches and cyclists may need to use some caution when using the Wattbike at low power outputs in a test-retest setting.

Item Type: Article
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Faculties > Social Sciences > School of Sport and Exercise Studies
Depositing User: James Hopker
Date Deposited: 21 Jan 2011 09:48
Last Modified: 22 May 2014 11:42
Resource URI: http://kar.kent.ac.uk/id/eprint/26276 (The current URI for this page, for reference purposes)
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