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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
Current Address: School of Public Health, Griffith University, Gold Coast Campus, Queensland 4222, Australia.
* Author to whom correspondence should be addressed.
Received: 26 March 2013; in revised form: 22 May 2013 / Accepted: 27 May 2013 / Published: 6 June 2013
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.
Keywords: time trial; caffeine; taurine; yerba maté; distance running
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MDPI and ACS Style
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.
Schubert MM, Astorino TA, Jr. JLA. The Effects of Caffeinated “Energy Shots” on Time Trial Performance. Nutrients. 2013; 5(6):2062-2075.
Schubert, Matthew M.; Astorino, Todd A.; Jr., John L.A. 2013. "The Effects of Caffeinated “Energy Shots” on Time Trial Performance." Nutrients 5, no. 6: 2062-2075.