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Laboratory predictors of uphill cycling performance in trained cyclists

Bossi, Arthur Henrique; Lima, Pedro; Lima, Jorge Perrout de; Hopker, James

Authors

Pedro Lima

Jorge Perrout de Lima

James Hopker



Abstract

This study aimed to assess the relationship between an uphill time-trial (TT) performance and both aerobic and anaerobic parameters obtained from laboratory tests. Fifteen cyclists performed a Wingate anaerobic test, a graded exercise test (GXT) and a field-based 20-min TT with 2.7% mean gradient. After a 5-week non-supervised training period, 10 of them performed a second TT for analysis of pacing reproducibility. Stepwise multiple regressions demonstrated that 91% of TT mean power output variation (W kg−1) could be explained by peak oxygen uptake (ml kg−1.min−1) and the respiratory compensation point (W kg−1), with standardised beta coefficients of 0.64 and 0.39, respectively. The agreement between mean power output and power at respiratory compensation point showed a bias ± random error of 16.2 ± 51.8 W or 5.7 ± 19.7%. One-way repeated-measures analysis of variance revealed a significant effect of the time interval (123.1 ± 8.7; 97.8 ± 1.2 and 94.0 ± 7.2% of mean power output, for epochs 0–2, 2–18 and 18–20 min, respectively; P < 0.001), characterising a positive pacing profile. This study indicates that an uphill, 20-min TT-type performance is correlated to aerobic physiological GXT variables and that cyclists adopt reproducible pacing strategies when they are tested 5 weeks apart (coefficients of variation of 6.3; 1 and 4%, for 0–2, 2–18 and 18–20 min, respectively).

Journal Article Type Article
Acceptance Date Apr 19, 2016
Online Publication Date May 7, 2016
Publication Date Jul 18, 2017
Deposit Date Aug 16, 2022
Journal Journal of Sports Sciences
Print ISSN 0264-0414
Electronic ISSN 1466-447X
Publisher Taylor & Francis
Peer Reviewed Peer Reviewed
Volume 35
Issue 14
Pages 1364-1371
DOI https://doi.org/10.1080/02640414.2016.1182199
Keywords Power output, field test, VO2max, pacing strategy, self-paced exercise
Public URL http://researchrepository.napier.ac.uk/Output/2896961