title: Impact of a carbohydrate-electrolyte drink on ingestive behaviour, affect and self-selected intensity during recreational exercise after 24-h fluid restriction.
abstract: This study examined the effects of a carbohydrate-electrolyte drink on voluntary fluid intake, affect and self-selected intensity during recreational exercise after fluid restriction. In a randomised counterbalanced design, ten physically active adults were dehydrated via a 24-h period of fluid restriction before completing two 20-min bouts of cardiovascular exercise, 20-min of resistance exercise and 20 min on a cycle ergometer at a self-selected intensity with ad libitum access to water (W) or a carbohydrate-electrolyte solution (CES). Fluid restriction induced hypohydration of ∼1.2% initial body mass. Fluid intake during exercise was greater with CES (2105 ± 363 vs. 1470 ± 429 mL; P<0.01) and resulted in more adequate hydration (-0.03 ± 0.65 vs. -1.26 ± 0.80%; P<0.01). Plasma glucose concentrations (4.48 ± 0.40 vs. 4.28 ± 0.32 mmol L(-1); P<0.01) and pleasure ratings (2.63 ± 1.17 vs. 1.81 ± 1.37; P<0.01) were greater with CES than W. Mean power output during exercise performed at a self-selected intensity was 5.6% greater with CES (171 ± 63 vs. 162 ± 60 W; P<0.05). In physically active adults performing a 'real-life' recreational exercise simulation, CES resulted in more adequate hydration and an enhanced affective experience that corresponded with an increase in self-selected exercise intensity.
authors.affiliation: Sport, Health and Exercise Science Research Group, Department for Health, University of Bath, Bath BA2 7AY, United Kingdom. Electronic address: O.J.Peacock@bath.ac.uk.
authors.forename: Oliver J
authors.initials: OJ
authors.lastname: Peacock
authors.affiliation: Sport, Health and Exercise Science Research Group, Department for Health, University of Bath, Bath BA2 7AY, United Kingdom.
authors.forename: Dylan
authors.initials: D
authors.lastname: Thompson
authors.affiliation: Sport, Health and Exercise Science Research Group, Department for Health, University of Bath, Bath BA2 7AY, United Kingdom.
authors.forename: Keith A
authors.initials: KA
authors.lastname: Stokes
mesh_terms: D000328:Adult; D001628:Beverages; D002241:Carbohydrates / Q000008:administration & dosage*; D018592:Cross-Over Studies; D003681:Dehydration / Q000628:therapy; D004326:Drinking; D004327:Drinking Behavior / Q000502:physiology*; D004573:Electrolytes / Q000008:administration & dosage*; D015444:Exercise / Q000502:physiology*; D005247:Feeding Behavior / Q000502:physiology; D006339:Heart Rate; D006801:Humans; D008297:Male; D010100:Oxygen / Q000378:metabolism; D014867:Water / Q000008:administration & dosage / Q000032:analysis; D055815:Young Adult
chemical_list: D002241:Carbohydrates; D004573:Electrolytes; D014867:Water; D010100:Oxygen