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Beverage carbohydrate concentration influences the intermittent endurance capacity of adolescent team games players during prolonged intermittent running

Abstract

This study investigated the influence of consuming a 2, 6, and 10% carbohydrate-electrolyte (CHO-E) solution on the intermittent endurance capacity and sprint performance of adolescent team games players. Seven participants (five males and two females; mean age 13.3 ± 0.5 years, height 1.71 ± 0.05 m, body mass (BM) 62.0 ± 6.3 kg) performed three trials separated by 3–7 days. In each trial, they completed four 15-min periods of part A of the Loughborough Intermittent Shuttle Test (LIST) followed by an intermittent run to exhaustion (part B). Participants consumed 5 ml kg−1 BM of the solution during the 5-min pre-exercise period, and a further 2 ml kg−1 BM every 15 min during part A of the LIST. Intermittent endurance capacity increased by 34% with ingestion of the 6% CHO-E solution compared with the 10% solution (5.5 ± 0.8 vs. 4.1 ± 1.5 min, P < 0.05), equating to a distance of 931 ± 172 versus 706 ± 272 m (P < 0.05). There was no significant difference between the 2% (4.8 ± 1.2 min) and 6% (P = 0.10) or the 2 and 10% solutions (P = 0.09). Carbohydrate concentration did not significantly influence mean 15-m sprint time (P = 0.38). These results suggest that the carbohydrate concentration of an ingested solution influences the intermittent endurance capacity of adolescent team games players with a 6% solution significantly more effective than a 10% solution.

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Acknowledgments

The authors gratefully acknowledge the support of High5 Ltd, Bardon, Leicestershire, UK, for the supply of maltodextrin, electrolyte tablets, and drink bottles to enable completion of this study. We wish to extend a special thanks to the staff, pupils and parents of George Watsons College, Edinburgh, for their invaluable participation in, and support of, this research project

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Correspondence to Shaun M. Phillips.

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Communicated by Susan A. Ward.

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Phillips, S.M., Turner, A.P., Sanderson, M.F. et al. Beverage carbohydrate concentration influences the intermittent endurance capacity of adolescent team games players during prolonged intermittent running. Eur J Appl Physiol 112, 1107–1116 (2012). https://doi.org/10.1007/s00421-011-2065-2

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  • DOI: https://doi.org/10.1007/s00421-011-2065-2

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