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Published on: August 12, 2016
Effects of conventional and sugar-free energy drinks intake in runners: a double-blind, randomized,
Hamilton H Reis1, Luciana M Lima2, Victória E Reis3
1Department of Physical Education, Federal University of Viçosa, Viçosa, Brazil - hhteixeirareis@gmail.com.
Background:
This study evaluated the effects of two types of energy drinks (ED) intake in trained runners.
Methods:
A double-blind randomized placebo-controlled clinical trial was conducted over 6 weeks. Participants and beverages were allocated by randomization. Twelve men 23±2.6 years, 177±3.4 cm, 74.4±5.5 kg, VO
Results:
Performance improved after consuming both ED (P<0.004 ED1 and P=0.001 ED2) with lower RPE (P<0.05 for ED1 and P<0.05 for ED2) compared to PL. Consumption of ED2 decreased RER values at 0-5 minutes and 40-45 minutes (P<0.001), and ED1 increased systolic BP (P<0.05) during exercise compared to PL. There were no differences in the evaluated parameters between EDs (P>0.05).
Conclusions:
Consumption of conventional or sugar free ED represents a valid ergogenic strategy to improve acute performance with reduction of RPE. However, intake of a conventional ED warrants caution, mainly because the effects on systolic BP.
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