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Title: The constant work rate critical power protocol overestimates ramp incremental exercise performance
Authors: Black, Matt I.
Jones, Andrew M.
Kelly, James A.
Bailey, Stephen J.
Vanhatalo, Anni
Issue Date: 2016
Publisher: Springer Berlin Heidelberg (© 2016, The Authors)
Citation: BLACK, M.I. ... et al, 2016. The constant work rate critical power protocol overestimates ramp incremental exercise performance. European Journal of Applied Physiology, 116 (11-12), pp.2415-2422
Abstract: Purpose: The parameters of the power-duration relationship (i.e., the critical power, CP, and the curvature constant, W′) may theoretically predict maximal performance capability for exercise above the CP. The CP and Wʹ are associated with the parameters of oxygen uptake (V ˙ O2) kinetics, which can be altered by manipulation of the work-rate forcing function. We tested the hypothesis that the CP and Wʹ derived from constant work-rate (CWR) prediction trials would overestimate ramp incremental exercise performance. Methods: Thirty subjects (males, n = 28; females, n = 2) performed a ramp incremental test, and 3–5 CWR prediction trials for the determination of the CP and Wʹ. Multiple ramp incremental tests and corresponding CP and Wʹ estimates were available for some subjects such that in total 51 ramp test performances were predicted. Results: The ramp incremental test performance (729 ± 113 s) was overestimated by the CP and Wʹ estimates derived from the best (751 ± 114 s, P < 0.05) and worst (749 ± 111 s, P < 0.05) individual fits of CWR prediction trial data. The error in the prediction was inversely correlated with the magnitude of the Wʹ for the best (r = −0.56, P < 0.05) and worst individual fits (r = −0.36, P < 0.05). Conclusions: The overestimation of ramp incremental performance suggests that the CP and Wʹ derived from different work-rate forcing functions, thus resulting in different V ˙ O2 kinetics, cannot be used interchangeably. The present findings highlight a potential source of error in performance prediction that is of importance to both researchers and applied practitioners.
Description: This article was published as Open Access by Springer. It is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Version: Published
DOI: 10.1007/s00421-016-3491-y
URI: https://dspace.lboro.ac.uk/2134/23754
Publisher Link: http://dx.doi.org/10.1007/s00421-016-3491-y
ISSN: 1439-6327
Appears in Collections:Published Articles (Sport, Exercise and Health Sciences)

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