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
Page range612 - 619
Research GroupMary MacKillop Institute for Health Research
Place of publicationUnited States of America
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Estimated sweat loss, fluid and CHO intake, and sodium balance of male major junior, AHL, and NHL players during on-ice practices
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