Reproducibility of pacing strategy during simulated 20-km cycling time trials in well-trained cyclists

Thomas, Kevin, Stone, Mark, Thompson, Kevin, St Clair Gibson, Alan and Ansley, Les (2011) Reproducibility of pacing strategy during simulated 20-km cycling time trials in well-trained cyclists. European Journal of Applied Physiology, 112 (1). pp. 223-229. ISSN 1439-6319

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Official URL: http://dx.doi.org/10.1007/s00421-011-1974-4

Abstract

The aim of the study was to assess the reproducibility of pacing strategy, physiological and perceptual responses during simulated 20-km cycling time trials. Seventeen well-trained male cyclists (VO2max = 4.70 ± 0.33 L min−1) completed three 20-km time trials on a Velotron Pro cycle ergometer within a maximum duration of 14 days. During all trials power output, cadence and respiratory exchange were recorded throughout, rating of perceived exertion and affective response were recorded every 2-km and capillary blood was sampled and assayed for the determination of lactate concentration every 4-km. Power output data was assigned to 1-km ‘bins’ and expressed relative to the mean to quantify pacing strategy. Reproducibility of the pacing strategy and the whole trial mean responses was subsequently quantified using typical error (TE) with 90% confidence intervals. The pacing strategy adopted was similar across repeat trials, though there was a higher degree of variability at the start and end of the trial (TE = 6.6 and 6.8% for the first and last 1-km), and a trend for a progressively blunted start on repeat trials. The reproducibility of performance, cardiorespiratory and perceptual measures was good (TE range 1.0–4.0%), but blood lactate exhibited higher variability (TE = 17.7%). The results demonstrate the performance, perceptual and physiological response to self-paced 20-km time trials is reproducible in well-trained cyclists. Future research should acknowledge that variability in pacing strategy at the start and end of a self-paced bout is likely regardless of any intervention employed.

Item Type: Article
Uncontrolled Keywords: Reproducibility, reliability, cycling, time-trial, pacing strategy, cardiorespiratory
Subjects: C600 Sports Science
Department: Faculties > Health and Life Sciences > Sport, Exercise and Rehabilitation
Depositing User: Ellen Cole
Date Deposited: 15 Dec 2011 11:21
Last Modified: 24 Oct 2017 11:42
URI: http://nrl.northumbria.ac.uk/id/eprint/4157

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