Laboratory predictors of uphill cycling performance in trained cyclists |
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| Authors: | Arthur Henrique Bossi Pedro Lima Jorge Perrout de Lima James Hopker |
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| Institution: | 1. Faculdade de Educa??o Física e Desportos, Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais, Brazilabossi.ef@gmail.com;3. Faculdade de Educa??o Física e Desportos, Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil;4. School of Sport and Exercise Sciences, University of Kent, Chatham Maritime, Chatham, Kent, England, UK |
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| Abstract: | ABSTRACTThis 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). |
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| Keywords: | Power output field test VO2max pacing strategy self-paced exercise |
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