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Creatine-electrolyte supplementation improves repeated sprint cycling performance: A double blind randomized control

Daniel L Crisafulli1, Harsh H Buddhadev1, Lorrie R Brilla1

  • 1Kinesiology Program, Department of Health and Human Development, Western Washington University, Carver 201L, MS 9067, 516 High Street, Bellingham, WA 98225 USA.

Journal of the International Society of Sports Nutrition
|May 11, 2018
PubMed
Summary

A creatine-electrolyte (CE) supplement improved cycling power output in male cyclists. This six-week intervention enhanced both overall and repeated sprint performance, indicating its ergogenic potential.

Keywords:
CreatineErgometerRecovery intervalSprint cyclingSprint duration

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Area of Science:

  • Exercise Physiology
  • Sports Nutrition
  • Nutritional Biochemistry

Background:

  • Creatine supplementation is a recognized ergogenic aid for enhancing repeated sprint cycling performance.
  • Electrolytes are known to increase creatine uptake.
  • Previous studies on creatine-electrolyte (CE) supplements did not demonstrate improved sprint cycling performance.

Purpose of the Study:

  • To investigate the effects of a six-week creatine-electrolyte (CE) supplementation on cycling power output.
  • To assess changes in overall and repeated peak and mean power during high-intensity cycling sprints.
  • To evaluate the impact of CE supplementation on performance with 2-minute recovery intervals between sprints.

Main Methods:

  • A double-blind, randomized controlled study involving 23 male recreational cyclists.
  • Participants were divided into a creatine-electrolyte (CE) group (n=12) and a placebo (P) group (n=11).
  • Power output was measured using a Velotron ergometer during five 15-second sprints with 2-minute recovery periods, pre- and post-supplementation. Statistical analysis employed mixed-model ANOVAs.

Main Results:

  • The CE group showed a significant 4% increase in overall peak power and a 5% increase in overall mean power post-supplementation (p<0.05).
  • No significant changes in overall peak or mean power were observed in the placebo group.
  • While the CE group demonstrated significant increases in peak and mean power during the first sprint effort, the placebo group showed no performance improvements.

Conclusions:

  • A creatine-electrolyte (CE) supplement effectively enhances overall cycling sprint performance.
  • CE supplementation also improves repeated short-duration sprint cycling performance when adequate recovery is provided.
  • The findings support the use of CE supplements as an ergogenic aid for cyclists in specific training protocols.