Voluntary fluid intake and core temperature responses in adolescent tennis players: sports beverage versus water.

British Journal of Sports Medicine
M F BergeronE L Marinik

Abstract

To examine differences in ad libitum fluid intake, comparing a 6% carbohydrate/electrolyte drink (CHO-E) and water, and associated differences in core temperature and other selected physiological and perceptual responses in adolescent athletes during tennis training in the heat. Fourteen healthy, fit, young tennis players (nine male; five female; mean (SD) age 15.1 (1.4) years; weight 60.6 (8.3) kg; height 172.8 (8.6) cm) completed two 120 minute tennis specific training sessions on separate days (randomised, crossover design) in a warm environment (wet bulb globe temperature: CHO-E, 79.3 (2.6) degrees F; water, 79.9 (2.2) degrees F; p>0.05). There were no significant differences (p>0.05) between the trials with respect to fluid intake, urine volume, fluid retention, sweat loss, perceived exertion, thirst, or gastrointestinal discomfort. However, there was a difference (p<0.05) in the percentage body weight change after training (CHO-E, -0.5 (0.7)%; water, -0.9 (0.6)%). Urine specific gravity before training (CHO-E, 1.024 (0.006); water, 1.025 (0.005)) did not correlate significantly (p>0.05) with any of these measurements or with core body temperature. In examining the main effect for trial, the CHO-E trial showed a significan...Continue Reading

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Citations

Jul 23, 2008·Journal of Sports Sciences·Claudia R JuzwiakVera L Szejnfeld
Mar 11, 2011·Journal of Sports Sciences·Rafael P SilvaJoão C B Marins
May 17, 2011·Journal of Sports Sciences·Oliver J PeacockDylan Thompson
May 3, 2007·British Journal of Sports Medicine·Daniel J HorneryWarren Young
Jun 15, 2007·British Journal of Sports Medicine·Michael F BergeronJohn F Coyle
Jun 14, 2012·Journal of Strength and Conditioning Research·Heather M Logan-Sprenger, Lawrence L Spriet
Jun 5, 2013·Pediatrics in Review·Michael F Bergeron
Aug 22, 2008·Wilderness & Environmental Medicine·John S CuddyBrent C Ruby
Jan 31, 2009·Journal of Athletic Training·Kristin L OsterbergLindsay B Baker
Jan 11, 2011·Journal of Athletic Training·Melissa L TippetCraig A Horswill
Mar 29, 2014·British Journal of Sports Medicine·Julien D PériardOlivier Girard
Mar 29, 2014·British Journal of Sports Medicine·Michael F Bergeron
Mar 29, 2014·British Journal of Sports Medicine·Todd S Ellenbecker, Kathleen A Stroia
Dec 18, 2010·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Boguslaw WilkOded Bar-Or
Sep 23, 2014·Current Reviews in Musculoskeletal Medicine·Andrew W Nichols
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Sep 6, 2008·American Journal of Hypertension·Chih-Cherng LuChing-Jiunn Tseng
Apr 4, 2008·Journal of the American Society of Nephrology : JASN·Dan Negoianu, Stanley Goldfarb
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Feb 9, 2021·Temperature : Multidisciplinary Biomedical Journal·Gregory W McGarrGlen P Kenny
Aug 10, 2011·Pediatrics·Michael F BergeronUNKNOWN American Academy of Pediatrics

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