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Nutrients 2014, 6(3), 1273-1292; doi:10.3390/nu6031273

Impact of Polyphenol Antioxidants on Cycling Performance and Cardiovascular Function

Human Performance Laboratory, Department of Kinesiology and Health Education, The University of Texas, Austin, TX 78712, USA
* Author to whom correspondence should be addressed.
Received: 30 January 2014 / Revised: 27 February 2014 / Accepted: 10 March 2014 / Published: 24 March 2014
(This article belongs to the Special Issue Sport and Performance Nutrition)
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This investigation sought to determine if supplementation with polyphenol antioxidant (PA) improves exercise performance in the heat (31.5 °C, 55% RH) by altering the cardiovascular and thermoregulatory responses to exercise. Twelve endurance trained athletes ingested PA or placebo (PLAC) for 7 days. Consecutive days of exercise testing were performed at the end of the supplementation periods. Cardiovascular and thermoregulatory measures were made during exercise. Performance, as measured by a 10 min time trial (TT) following 50 min of moderate intensity cycling, was not different between treatments (PLAC: 292 ± 33 W and PA: 279 ± 38 W, p = 0.12). Gross efficiency, blood lactate, maximal neuromuscular power, and ratings of perceived exertion were also not different between treatments. Similarly, performance on the second day of testing, as assessed by time to fatigue at maximal oxygen consumption, was not different between treatments (PLAC; 377 ± 117 s vs. PA; 364 ± 128 s, p = 0.61). Cardiovascular and thermoregulatory responses to exercise were not different between treatments on either day of exercise testing. Polyphenol antioxidant supplementation had no impact on exercise performance and did not alter the cardiovascular or thermoregulatory responses to exercise in the heat.
Keywords: thermoregulation; exercise; antioxidant thermoregulation; exercise; antioxidant
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Trinity, J.D.; Pahnke, M.D.; Trombold, J.R.; Coyle, E.F. Impact of Polyphenol Antioxidants on Cycling Performance and Cardiovascular Function. Nutrients 2014, 6, 1273-1292.

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