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Effect of Glycerol-Induced Hyperhydration on a 5-kilometer Running Time-Trial Performance in the Heat in Recreationally Active Individuals

Maximal oxygen consumption ([Formula: see text] O(2max)) is a major determinant of 5-km running time-trial (TT) performance. Glycerol-induced hyperhydration (GIH) could improve [Formula: see text] O(2max) in recreationally active persons through an optimal increase in plasma volume. Moreover, ingest...

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Autores principales: Jolicoeur Desroches, Antoine, Naulleau, Catherine, Deshayes, Thomas A., Parent-Roberge, Hugo, Pancrate, Timothée, Goulet, Eric D. B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9919238/
https://www.ncbi.nlm.nih.gov/pubmed/36771308
http://dx.doi.org/10.3390/nu15030599
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author Jolicoeur Desroches, Antoine
Naulleau, Catherine
Deshayes, Thomas A.
Parent-Roberge, Hugo
Pancrate, Timothée
Goulet, Eric D. B.
author_facet Jolicoeur Desroches, Antoine
Naulleau, Catherine
Deshayes, Thomas A.
Parent-Roberge, Hugo
Pancrate, Timothée
Goulet, Eric D. B.
author_sort Jolicoeur Desroches, Antoine
collection PubMed
description Maximal oxygen consumption ([Formula: see text] O(2max)) is a major determinant of 5-km running time-trial (TT) performance. Glycerol-induced hyperhydration (GIH) could improve [Formula: see text] O(2max) in recreationally active persons through an optimal increase in plasma volume. Moreover, ingestion of a large bolus of cold fluid before exercise could decrease thermal stress during exercise, potentially contributing to improved performance. We determined the effect of GIH on 5-km running TT performance in 10 recreationally active individuals (age: 24 ± 4 years; [Formula: see text] O(2max): 48 ± 3 mL/kg/min). Using a randomized and counterbalanced protocol, participants underwent two, 120-min hydration protocols where they ingested a 1) 30 mL/kg fat-free mass (FFM) of cold water (~4 °C) with an artificial sweetener + 1.4 g glycerol/kg FFM over the first 60 min (GIH) or 2) 7.5 mL/kg FFM of cold water with an artificial sweetener over the first 20 min (EUH). Following GIH and EUH, participants underwent a 5-km running TT at 30 °C and 50% relative humidity. After 120 min, GIH was associated with significantly greater fluid retention (846 ± 415 mL) and plasma volume changes (10.1 ± 8.4%) than EUH, but gastrointestinal (GI) temperature did not differ. During exercise, 5-km running TT performance (GIH: 22.95 ± 2.62; EUH: 22.52 ± 2.74 min), as well as heart rate, GI temperature and perceived exertion did not significantly differ between conditions. This study demonstrates that the additional body water and plasma volume gains provided by GIH do not improve 5-km running TT performance in the heat in recreationally active individuals.
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spelling pubmed-99192382023-02-12 Effect of Glycerol-Induced Hyperhydration on a 5-kilometer Running Time-Trial Performance in the Heat in Recreationally Active Individuals Jolicoeur Desroches, Antoine Naulleau, Catherine Deshayes, Thomas A. Parent-Roberge, Hugo Pancrate, Timothée Goulet, Eric D. B. Nutrients Article Maximal oxygen consumption ([Formula: see text] O(2max)) is a major determinant of 5-km running time-trial (TT) performance. Glycerol-induced hyperhydration (GIH) could improve [Formula: see text] O(2max) in recreationally active persons through an optimal increase in plasma volume. Moreover, ingestion of a large bolus of cold fluid before exercise could decrease thermal stress during exercise, potentially contributing to improved performance. We determined the effect of GIH on 5-km running TT performance in 10 recreationally active individuals (age: 24 ± 4 years; [Formula: see text] O(2max): 48 ± 3 mL/kg/min). Using a randomized and counterbalanced protocol, participants underwent two, 120-min hydration protocols where they ingested a 1) 30 mL/kg fat-free mass (FFM) of cold water (~4 °C) with an artificial sweetener + 1.4 g glycerol/kg FFM over the first 60 min (GIH) or 2) 7.5 mL/kg FFM of cold water with an artificial sweetener over the first 20 min (EUH). Following GIH and EUH, participants underwent a 5-km running TT at 30 °C and 50% relative humidity. After 120 min, GIH was associated with significantly greater fluid retention (846 ± 415 mL) and plasma volume changes (10.1 ± 8.4%) than EUH, but gastrointestinal (GI) temperature did not differ. During exercise, 5-km running TT performance (GIH: 22.95 ± 2.62; EUH: 22.52 ± 2.74 min), as well as heart rate, GI temperature and perceived exertion did not significantly differ between conditions. This study demonstrates that the additional body water and plasma volume gains provided by GIH do not improve 5-km running TT performance in the heat in recreationally active individuals. MDPI 2023-01-24 /pmc/articles/PMC9919238/ /pubmed/36771308 http://dx.doi.org/10.3390/nu15030599 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Jolicoeur Desroches, Antoine
Naulleau, Catherine
Deshayes, Thomas A.
Parent-Roberge, Hugo
Pancrate, Timothée
Goulet, Eric D. B.
Effect of Glycerol-Induced Hyperhydration on a 5-kilometer Running Time-Trial Performance in the Heat in Recreationally Active Individuals
title Effect of Glycerol-Induced Hyperhydration on a 5-kilometer Running Time-Trial Performance in the Heat in Recreationally Active Individuals
title_full Effect of Glycerol-Induced Hyperhydration on a 5-kilometer Running Time-Trial Performance in the Heat in Recreationally Active Individuals
title_fullStr Effect of Glycerol-Induced Hyperhydration on a 5-kilometer Running Time-Trial Performance in the Heat in Recreationally Active Individuals
title_full_unstemmed Effect of Glycerol-Induced Hyperhydration on a 5-kilometer Running Time-Trial Performance in the Heat in Recreationally Active Individuals
title_short Effect of Glycerol-Induced Hyperhydration on a 5-kilometer Running Time-Trial Performance in the Heat in Recreationally Active Individuals
title_sort effect of glycerol-induced hyperhydration on a 5-kilometer running time-trial performance in the heat in recreationally active individuals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9919238/
https://www.ncbi.nlm.nih.gov/pubmed/36771308
http://dx.doi.org/10.3390/nu15030599
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