The effects of different doses of caffeine on endurance cycling time trial performance

Journal article


Desbrow, Ben, Biddulph, Caren, Devlin, Brooke, Grant, Gary D., Anoopkumar-Dukie, Shailendra and Leveritt, Michael D.. (2012) The effects of different doses of caffeine on endurance cycling time trial performance. Journal of Sports Sciences. 30(2), pp. 115-120. https://doi.org/10.1080/02640414.2011.632431
AuthorsDesbrow, Ben, Biddulph, Caren, Devlin, Brooke, Grant, Gary D., Anoopkumar-Dukie, Shailendra and Leveritt, Michael D.
Abstract

This study investigated the effects of two different doses of caffeine on endurance cycle time trial performance in male athletes. Using a randomised, placebo-controlled, double-blind crossover study design, sixteen well-trained and familiarised male cyclists (Mean ± s: Age = 32.6 ± 8.3 years; Body mass = 78.5 ± 6.0 kg; Height = 180.9 ± 5.5 cm [Vdot]O2peak = 60.4 ± 4.1 ml · kg−1 · min−1) completed three experimental trials, following training and dietary standardisation. Participants ingested either a placebo, or 3 or 6 mg · kg−1 body mass of caffeine 90 min prior to completing a set amount of work equivalent to 75% of peak sustainable power output for 60 min. Exercise performance was significantly (P < 0.05) improved with both caffeine treatments as compared to placebo (4.2% with 3 mg · kg−1 body mass and 2.9% with 6 mg · kg−1 body mass). The difference between the two caffeine doses was not statistically significant (P = 0.24). Caffeine ingestion at either dose resulted in significantly higher heart rate values than the placebo conditions (P < 0.05), but no statistically significant treatment effects in ratings of perceived exertion (RPE) were observed (P = 0.39). A caffeine dose of 3 mg · kg−1 body mass appears to improve cycling performance in well-trained and familiarised athletes. Doubling the dose to 6 mg · kg−1 body mass does not confer any additional improvements in performance.

Keywordsathletes; dose-response relationship; glucose; exercise; endurance; methylxanthine
Year2012
JournalJournal of Sports Sciences
Journal citation30 (2), pp. 115-120
PublisherRoutledge
ISSN0264-0414
Digital Object Identifier (DOI)https://doi.org/10.1080/02640414.2011.632431
Scopus EID2-s2.0-83755187913
Research or scholarlyResearch
Page range115-120
Publisher's version
License
All rights reserved
File Access Level
Controlled
Output statusPublished
Publication dates
Online06 Dec 2011
Publication process dates
Accepted12 Oct 2011
Deposited10 May 2021
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