Caffeine and sprinting performance: dose responses and efficacy

J Strength Cond Res. 2012 Apr;26(4):1001-5. doi: 10.1519/JSC.0b013e31822ba300.

Abstract

The aims of this study were to evaluate the effects of caffeine supplementation on sprint cycling performance and to determine if there was a dose-response effect. Using a randomized, double-blind, placebo-controlled design, 17 well-trained men (age: 24 ± 6 years, height: 1.82 ± 0.06 m, and body mass(bm): 82.2 ± 6.9 kg) completed 7 maximal 10-second sprint trials on an electromagnetically braked cycle ergometer. Apart from trial 1 (familiarization), all the trials involved subjects ingesting a gelatine capsule containing either caffeine or placebo (maltodextrin) 1 hour before each sprint. To examine dose-response effects, caffeine doses of 2, 4, 6, 8, and 10 mg·kg bm(-1) were used. There were no significant (p ≥ 0.05) differences in baseline measures of plasma caffeine concentration before each trial (grand mean: 0.14 ± 0.28 μg·ml(-1)). There was, however, a significant supplement × time interaction (p < 0.001), with larger caffeine doses producing higher postsupplementation plasma caffeine levels. In comparison with placebo, caffeine had no significant effect on peak power (p = 0.11), mean power (p = 0.55), or time to peak power (p = 0.17). There was also no significant effect of supplementation on pretrial blood lactate (p = 0.58), but there was a significant time effect (p = 0.001), with blood lactate reducing over the 50 minute postsupplementation rest period from 1.29 ± 0.36 to 1.06 ± 0.33 mmol·L(-1). The results of this study show that caffeine supplementation has no effect on short-duration sprint cycling performance, irrespective of the dosage used.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Athletic Performance*
  • Bicycling*
  • Caffeine / administration & dosage*
  • Caffeine / blood
  • Central Nervous System Stimulants / administration & dosage*
  • Central Nervous System Stimulants / blood
  • Dose-Response Relationship, Drug
  • Double-Blind Method
  • Humans
  • Lactic Acid / blood
  • Male
  • Muscle Strength / drug effects
  • Muscle, Skeletal / drug effects
  • Young Adult

Substances

  • Central Nervous System Stimulants
  • Lactic Acid
  • Caffeine