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The Effects of Caffeinated “Energy Shots” on Time Trial Performance

Department of Kinesiology, California State University Chico, 400 W. 1st Street, Yolo Hall 243, Chico, CA 95929, USA
Department of Kinesiology, California State University San Marcos, 333 S. Twin Oaks Valley Road, University Hall 320, San Marcos, CA 92096, USA
Author to whom correspondence should be addressed.
Current Address: School of Public Health, Griffith University, Gold Coast Campus, Queensland 4222, Australia.
Nutrients 2013, 5(6), 2062-2075;
Received: 26 March 2013 / Revised: 22 May 2013 / Accepted: 27 May 2013 / Published: 6 June 2013
PDF [809 KB, uploaded 13 June 2013]


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. View Full-Text
Keywords: time trial; caffeine; taurine; yerba maté; distance running time trial; caffeine; taurine; yerba maté; distance running

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Schubert, M.M.; Astorino, T.A.; Jr., J.L.A. The Effects of Caffeinated “Energy Shots” on Time Trial Performance. Nutrients 2013, 5, 2062-2075.

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