The effects of caffeinated "energy shots" on time trial performance

Nutrients. 2013 Jun 6;5(6):2062-75. doi: 10.3390/nu5062062.

Abstract

An emerging trend in sports nutrition is the consumption of energy drinks and "energy shots". Energy shots may prove to be a viable pre-competition supplement for runners. Six male runners (mean ± SD age and VO2max: 22.5 ± 1.8 years and 69.1 ± 5.7 mL·kg-1·min-1) completed three trials [placebo (PLA; 0 mg caffeine), Guayakí Yerba Maté Organic Energy Shot™ (YM; 140 mg caffeine), or Red Bull Energy Shot™ (RB; 80 mg caffeine)]. Treatments were ingested following a randomized, placebo-controlled crossover design. Participants ran a five kilometer time trial on a treadmill. No differences (p > 0.05) in performance were detected with RB (17.55 ± 1.01 min) or YM ingestion (17.86 ± 1.59 min) compared to placebo (17.44 ± 1.25 min). Overall, energy shot ingestion did not improve time-trial running performance in trained runners.

Publication types

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

MeSH terms

  • Adult
  • Athletic Performance*
  • Caffeine / administration & dosage*
  • Cross-Over Studies
  • Dietary Supplements*
  • Dose-Response Relationship, Drug
  • Energy Drinks / analysis*
  • Exercise Test / drug effects
  • Humans
  • Male
  • Oxygen Consumption / drug effects
  • Physical Endurance / drug effects
  • Running
  • Young Adult

Substances

  • Caffeine