Estimated sweat loss, fluid and CHO intake, and sodium balance of male major junior, AHL, and NHL players during on-ice practices

Journal article


Gamble, Alexander S. D., Bigg, Jessica L., Vermeulen, Tyler F., Boville, Stephanie M., Eskedjian, Greg S., Jannas-Vela, Sebastian, Whitfield, Jamie, Palmer, Matthew S. and Spriet, Lawrence L.. (2019) Estimated sweat loss, fluid and CHO intake, and sodium balance of male major junior, AHL, and NHL players during on-ice practices. International Journal of Sport Nutrition and Exercise Metabolism. 29(6), pp. 612 - 619. https://doi.org/10.1123/ijsnem.2019-0029
AuthorsGamble, Alexander S. D., Bigg, Jessica L., Vermeulen, Tyler F., Boville, Stephanie M., Eskedjian, Greg S., Jannas-Vela, Sebastian, Whitfield, Jamie, Palmer, Matthew S. and Spriet, Lawrence L.
Abstract

Several previous studies have reported performance decrements in team sport athletes who dehydrated approximately 1.5–2% of their body mass (BM) through sweating. This study measured on-ice sweat loss, fluid intake, sodium balance, and carbohydrate (CHO) intake of 77 major junior (JR; 19 ± 1 years), 60 American Hockey League (AHL; 24 ± 4 years), and 77 National Hockey League (NHL; 27 ± 5 years) players. Sweat loss was calculated from pre- to post-exercise BM plus fluid intake minus urine loss. AHL (2.03 ± 0.62 L/hr) and NHL (2.02 ± 0.74 L/hr) players had higher sweat rates (p < .05) than JR players (1.63 ± 0.58 L/hr). AHL (1.23 ± 0.69%; p = .006) and NHL (1.29% ± 0.63%; p < .001) players had ∼30% greater BM losses than JR players (0.89% ± 0.57%). There was no difference in fluid intake between groups (p > .05). Sodium deficits (sodium loss − intake) were greater (p < .05) in AHL (1.68 ± 0.74 g/hr) and NHL (1.56 ± 0.84 g/hr) players compared with JR players (1.01 ± 0.50 g/hr). CHO intake was similar between groups (14–20 g CHO/hr), with 29%, 32%, and 40% of JR, AHL, and NHL players consuming no CHO, respectively. In summary, sweat rates were high in all players, but the majority of players (74/77, 54/60, and 68/77 of JR, AHL, and NHL, respectively) avoided mild dehydration (>2% BM) during 60 min of practice. However, ∼15%, 41%, and 48% of the JR, AHL, and NHL players, respectively, may have reached mild dehydration and increased risk of performance decrements in a 90-min practice.

Keywordshydration; elite ice hockey; sweat rates
Year2019
JournalInternational Journal of Sport Nutrition and Exercise Metabolism
Journal citation29 (6), pp. 612 - 619
PublisherHuman Kinetics, Inc.
ISSN1526-484X
Digital Object Identifier (DOI)https://doi.org/10.1123/ijsnem.2019-0029
Scopus EID2-s2.0-85076501137
Open accessPublished as green open access
Page range612 - 619
Research GroupMary MacKillop Institute for Health Research
Author's accepted manuscript
Publisher's version
Additional information

Accepted author manuscript version reprinted, by permission, from International Journal of Sport Nutrition and Exercise Metabolism, 2019, 29(6): 612-619, https://doi.org/10.1123/ijsnem.2019-0029. © 2019 Human Kinetics, Inc.

Place of publicationUnited States of America
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