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Nutrients 2013, 5(12), 5193-5204;

The Effect of Carbohydrate Ingestion on Performance during a Simulated Soccer Match

UCT/MRC Research Unit for Exercise Science and Sports Medicine, University of Cape Town, P.O. Box 115, Newlands, 7725, Cape Town 7700, South Africa
South African Medical Research Council, Parow, Cape Town 7505, South Africa
UCT/MRC Research Unit for Nutrition and Dietetics, Department of Human Biology, University of Cape Town, Cape Town 7700, South Africa
Discovery Health High Performance Centre, Sports Science Institute of South Africa, Newlands, Cape Town 7700, South Africa
Author to whom correspondence should be addressed.
Received: 16 October 2013 / Revised: 1 December 2013 / Accepted: 4 December 2013 / Published: 16 December 2013
(This article belongs to the Special Issue Sport and Performance Nutrition)
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Aim: This study investigated how performance was affected after soccer players, in a postprandial state, ingested a 7% carbohydrate (CHO) solution compared to a placebo (0% CHO) during a simulated soccer match. Methods: Using a double-blind placebo-controlled design, 22 trained male league soccer players (age: 24 ± 7 years, wt: 73.4 ± 12.0 kg, VO2max: 51.8 ± 4.3 mL O2/kg/min) completed two trials, separated by 7 days, during which they ingested, in random order, 700 mL of either a 7% CHO or placebo drink during a simulated soccer match. Ratings of perceived exertion (RPE), agility, timed and run to fatigue were measured during the trials. Results: Change in agility times was not altered by CHO vs. placebo ingestion (0.57 ± 1.48 vs. 0.66 ± 1.00, p = 0.81). Timed runs to fatigue were 381 ± 267 s vs. 294 ± 159 s for the CHO and placebo drinks, respectively (p = 0.11). Body mass modified the relationship between time to fatigue and drink ingestion (p = 0.02 for drink × body mass), such that lower body mass was associated with increased time to fatigue when the players ingested CHO, but not placebo. RPE values for the final stage of the simulated soccer match were 8.5 ± 1.7 and 8.6 ± 1.5 for the CHO and placebo drinks respectively (p = 0.87). Conclusions: The group data showed that the 7% CHO solution (49 g CHO) did not significantly improve performance during a simulated soccer match in league soccer players who had normal pre-match nutrition. However, when adjusting for body mass, increasing CHO intake was associated with improved time to fatigue during the simulated soccer match. View Full-Text
Keywords: intermittent exercise; supplementation; sports drinks; football intermittent exercise; supplementation; sports drinks; football

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Goedecke, J.H.; White, N.J.; Chicktay, W.; Mahomed, H.; Durandt, J.; Lambert, M.I. The Effect of Carbohydrate Ingestion on Performance during a Simulated Soccer Match. Nutrients 2013, 5, 5193-5204.

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