title: The effects of caffeinated "energy shots" on time trial performance.
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.
authors.affiliation: Department of Kinesiology, California State University Chico, 400 W. 1st Street, Yolo Hall 243, Chico, CA 95929, USA. m.schubert@griffith.edu.au
authors.forename: Matthew Mark
authors.initials: MM
authors.lastname: Schubert
authors.forename: Todd Anthony
authors.initials: TA
authors.lastname: Astorino
authors.forename: John Leal
authors.initials: JL
authors.lastname: Azevedo
mesh_terms: D000328:Adult; D054874:Athletic Performance; D002110:Caffeine / Q000008:administration & dosage*; D018592:Cross-Over Studies; D019587:Dietary Supplements; D004305:Dose-Response Relationship, Drug; D061215:Energy Drinks / Q000032:analysis*; D005080:Exercise Test / Q000187:drug effects; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000187:drug effects; D010807:Physical Endurance / Q000187:drug effects; D012420:Running; D055815:Young Adult
chemical_list: D002110:Caffeine