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Acute Effects of Polyphenols from Cranberries and Grape Seeds on Endothelial Function and Performance in Elite Athletes

Authors :
Kim Labonté
Charles Couillard
Annie Motard-Bélanger
Marie-Eve Paradis
Patrick Couture
Benoît Lamarche
Source :
Sports, Vol 1, Iss 3, Pp 55-68 (2013)
Publication Year :
2013
Publisher :
MDPI AG, 2013.

Abstract

We examined how intake of polyphenols modifies brachial artery flow-mediated dilation (FMD) at rest, and cycling anaerobic performance, in elite athletes. In the first randomized cross-over study, FMD was measured over a three-hour period on two occasions in eight elite male and female athletes after acute consumption of either polyphenols from cranberries and grape seeds (600 mg) or a polyphenol-free placebo drink. Consumption of the polyphenol-rich drink led to a significant increase in FMD compared to placebo (p = 0.02), with a peak at 60 min. In a second study, 12 elite male and female athletes completed a three-kilometer time trial (TT) on an ergocycle on two occasions in random order, either after consumption of 800 mg of polyphenols or a placebo. Acute intake of the polyphenol extract had no impact on the three-kilometer time trial completion. However, plasma lactate levels were significantly lower before and after the TT when subjects consumed the polyphenols vs. placebo (p < 0.05). Results suggest that polyphenols from cranberries and grape seeds acutely modifies FMD at rest in elite athletes but this does not translate into enhanced cycling anaerobic performance.

Details

Language :
English
ISSN :
20754663
Volume :
1
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Sports
Publication Type :
Academic Journal
Accession number :
edsdoj.4ecfd343df0247dc87cc012c0a32bf01
Document Type :
article
Full Text :
https://doi.org/10.3390/sports1030055