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Laboratory predictors of uphill cycling performance in trained cyclists

Bossi, Arthur, Lima, Pedro, Lima, Jorge, Hopker, James G. (2016) Laboratory predictors of uphill cycling performance in trained cyclists. Journal of Sports Sciences, 14 . pp. 1364-1371. ISSN 0264-0414. (doi:10.1080/02640414.2016.1182199) (KAR id:55698)

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).

Item Type: Article
DOI/Identification number: 10.1080/02640414.2016.1182199
Uncontrolled keywords: Power output, field test, VO2max, pacing strategy, self-paced exercise
Subjects: G Geography. Anthropology. Recreation > GV Recreation. Leisure > Sports sciences
R Medicine > RC Internal medicine > RC1235 Physiology of sports
Divisions: Divisions > Division of Natural Sciences > Sport and Exercise Sciences
Depositing User: James Hopker
Date Deposited: 25 May 2016 19:48 UTC
Last Modified: 09 Dec 2022 03:27 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/55698 (The current URI for this page, for reference purposes)

University of Kent Author Information

Bossi, Arthur.

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CReDIT Contributor Roles:

Hopker, James G..

Creator's ORCID: https://orcid.org/0000-0002-4786-7037
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