Hydration, thermoregulation, and performance effects of two sport drinks during soccer training sessions

Journal of Strength and Conditioning Research
Jason C SieglerRobert A Robergs

Abstract

In the present study, we aimed to compare the thermoregulatory response and soccer-specific training performance aspects of two commercially available sport drinks, both of similar carbohydrate concentration, but one containing 5.2% glycerol. Ten players participated in two similar outdoor training sessions and were randomly assigned to each of two drinks: a carbohydrate (C) beverage or a carbohydrate-glycerol (CG) beverage. Players consumed 500 mL of C or CG 30 minutes pre-exercise and at half-time. Pre- and postexercise body mass, core temperature (CT), and heart rate (HR) were recorded, and urine and blood samples were taken. No difference was observed between days for wet bulb globe temperature (session 1: 17.0 +/- 1.1 degrees C, session 2: 16.9 +/- 1.1 degrees C; P = 0.944). The degree of dehydration (% Delta BM) was greater after the C trial (P = 0.041). Similarly, percent change in plasma volume was greater in the C trial (P = 0.049). No overall main affect was observed between CT and mean exercise HRs during either training session (CT: P = 0.350; mean HR: P = 0.256), and there was no difference observed between groups in time to failure during the session-ending fatigue test (P = 0.547). Ingestion of a CG beverage prov...Continue Reading

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Citations

Nov 26, 2009·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Michael J PriceVictoria L Goosey-Tolfrey
Jan 23, 2010·Sports Medicine·Simon Piet van RosendalJeff Scott Coombes
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Nov 25, 2016·Journal of Applied Physiology·Glen P Kenny, Ryan McGinn
Oct 7, 2017·Journal of Athletic Training·Brendon P McDermottWilliam O Roberts

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