University of Hertfordshire

Caffeine and Sprint Cycling Performance: Effects of Torque Factor and Sprint Duration.

Research output: Contribution to journalArticlepeer-review


  • Mark Glaister
  • Colin Towey
  • Owen Jeffries
  • Daniel Muniz
  • Paul Foley
  • Gillian McInnes
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Original languageEnglish
Number of pages19
JournalInternational Journal of Sports Physiology and Performance
Early online date11 Sep 2018
Publication statusE-pub ahead of print - 11 Sep 2018


The aim of this study was to investigate the influence of torque factor and sprint duration on the effects of caffeine on sprint cycling performance.

Using a counterbalanced, randomized, double-blind, placebo-controlled design, 13 men completed nine trials. In Trial 1, participants completed a series of 6 s sprints at increasing torque factors, to determine the torque factor, for each individual, which elicited the highest (TOPTIMAL) peak power output (PPO). The remaining trials involved all combinations of torque factor (0.8 N∙m∙kg-1 versus TOPTIMAL), sprint duration (10 s versus 30 s), and supplementation (caffeine [5 mg∙kg-1] versus placebo).

There was a significant effect of torque factor on PPO, with higher values at TOPTIMAL (mean difference: 168 W; 95% likely range: 142 - 195 W). There was also a significant effect of sprint duration on PPO, with higher values in 10 s sprints (mean difference: 52 W; 95% likely range: 18 - 86 W). However, there was no effect of supplementation on PPO (p = 0.056). Nevertheless, there was a significant torque factor × sprint duration × supplement interaction (p = 0.036), with post hoc tests revealing that caffeine produced a higher PPO (mean difference: 76 W; 95% likely range: 19 - 133 W) when the sprint duration was 10 s and the torque factor was TOPTIMAL.

The results of this study show that when torque factor and sprint duration are optimized, to allow participants to express their highest PPO, there is a clear effect of caffeine on sprinting performance.


This article has been accepted for publication in the International Journal of Sports Physiology and Performance. The final publication is available at © Human Kinetics 2018

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