Sports Dietitians Australia Position Statement: Nutrition for Exercise in Hot Environments

Alan J. McCubbin, Bethanie A. Allanson, Joanne N. Caldwell Odgers, Michelle M Cort, Ricardo J S Costa, Gregory Roland Cox, Siobhan Crawshay, Ben Desbrow, Eliza G. Freney, Stephanie K. Gaskell, David Hughes, Chris Irwin, Ollie Jay, Benita Lalor, Megan L. Ross, Gregory Shaw, Julien D. Periard, Louise M. Burke

Research output: Contribution to journalArticleResearchpeer-review

Abstract

It is the position of Sports Dietitians Australia (SDA) that exercise in hot and/or humid environments, or with significant clothing and/or equipment that prevents body heat loss (i.e., exertional heat stress), provides significant challenges to an athlete’s nutritional status, health, and performance. Exertional heat stress, especially when prolonged, can perturb thermoregulatory, cardiovascular, and gastrointestinal systems. Heat acclimation or acclimatization provides beneficial adaptations and should be undertaken where possible. Athletes should aim to begin exercise euhydrated. Furthermore, preexercise hyperhydration may be desirable in some scenarios and can be achieved through acute sodium or glycerol loading protocols. The assessment of fluid balance during exercise, together with gastrointestinal tolerance to fluid intake, and the appropriateness of thirst responses provide valuable information to inform fluid replacement strategies that should be integrated with event fuel requirements. Such strategies should also consider fluid availability and opportunities to drink, to prevent significant under- or overconsumption during exercise. Postexercise beverage choices can be influenced by the required timeframe for return to euhydration and co-ingestion of meals and snacks. Ingested beverage temperature can influence core temperature, with cold/icy beverages of potential use before and during exertional heat stress, while use of menthol can alter thermal sensation. Practical challenges in supporting athletes in teams and traveling for competition require careful planning. Finally, specific athletic population groups have unique nutritional needs in the context of exertional heat stress (i.e., youth, endurance/ultra-endurance athletes, and para-sport athletes), and specific adjustments to nutrition strategies should be made for these population groups.
Original languageEnglish
JournalInternational Journal of Sport Nutrition and Exercise Metabolism
DOIs
Publication statusE-pub ahead of print - 2020

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Nutritionists
athletes
dietitians
sports
Sports
exercise
Hot Temperature
heat stress
Exercise
nutrition
Athletes
beverages
Beverages
heat
acclimation
Acclimatization
Population Groups
thirst
menthol
cardiovascular system

Cite this

McCubbin, Alan J. ; Allanson, Bethanie A. ; Caldwell Odgers, Joanne N. ; Cort, Michelle M ; Costa, Ricardo J S ; Cox, Gregory Roland ; Crawshay, Siobhan ; Ben Desbrow ; Freney, Eliza G. ; Gaskell, Stephanie K. ; Hughes, David ; Irwin, Chris ; Jay, Ollie ; Lalor, Benita ; Ross, Megan L. ; Shaw, Gregory ; Periard, Julien D. ; Burke, Louise M. / Sports Dietitians Australia Position Statement: Nutrition for Exercise in Hot Environments. In: International Journal of Sport Nutrition and Exercise Metabolism. 2020.
@article{1fc4c4609dba47af8cebece3ad09ae16,
title = "Sports Dietitians Australia Position Statement: Nutrition for Exercise in Hot Environments",
abstract = "It is the position of Sports Dietitians Australia (SDA) that exercise in hot and/or humid environments, or with significant clothing and/or equipment that prevents body heat loss (i.e., exertional heat stress), provides significant challenges to an athlete’s nutritional status, health, and performance. Exertional heat stress, especially when prolonged, can perturb thermoregulatory, cardiovascular, and gastrointestinal systems. Heat acclimation or acclimatization provides beneficial adaptations and should be undertaken where possible. Athletes should aim to begin exercise euhydrated. Furthermore, preexercise hyperhydration may be desirable in some scenarios and can be achieved through acute sodium or glycerol loading protocols. The assessment of fluid balance during exercise, together with gastrointestinal tolerance to fluid intake, and the appropriateness of thirst responses provide valuable information to inform fluid replacement strategies that should be integrated with event fuel requirements. Such strategies should also consider fluid availability and opportunities to drink, to prevent significant under- or overconsumption during exercise. Postexercise beverage choices can be influenced by the required timeframe for return to euhydration and co-ingestion of meals and snacks. Ingested beverage temperature can influence core temperature, with cold/icy beverages of potential use before and during exertional heat stress, while use of menthol can alter thermal sensation. Practical challenges in supporting athletes in teams and traveling for competition require careful planning. Finally, specific athletic population groups have unique nutritional needs in the context of exertional heat stress (i.e., youth, endurance/ultra-endurance athletes, and para-sport athletes), and specific adjustments to nutrition strategies should be made for these population groups.",
author = "McCubbin, {Alan J.} and Allanson, {Bethanie A.} and {Caldwell Odgers}, {Joanne N.} and Cort, {Michelle M} and Costa, {Ricardo J S} and Cox, {Gregory Roland} and Siobhan Crawshay and {Ben Desbrow} and Freney, {Eliza G.} and Gaskell, {Stephanie K.} and David Hughes and Chris Irwin and Ollie Jay and Benita Lalor and Ross, {Megan L.} and Gregory Shaw and Periard, {Julien D.} and Burke, {Louise M.}",
year = "2020",
doi = "10.1123/ijsnem.2019-0300",
language = "English",
journal = "International Journal of Sport Nutrition",
issn = "1526-484X",
publisher = "Human Kinetics Publishers Inc.",

}

McCubbin, AJ, Allanson, BA, Caldwell Odgers, JN, Cort, MM, Costa, RJS, Cox, GR, Crawshay, S, Ben Desbrow, Freney, EG, Gaskell, SK, Hughes, D, Irwin, C, Jay, O, Lalor, B, Ross, ML, Shaw, G, Periard, JD & Burke, LM 2020, 'Sports Dietitians Australia Position Statement: Nutrition for Exercise in Hot Environments', International Journal of Sport Nutrition and Exercise Metabolism. https://doi.org/10.1123/ijsnem.2019-0300

Sports Dietitians Australia Position Statement: Nutrition for Exercise in Hot Environments. / McCubbin, Alan J.; Allanson, Bethanie A.; Caldwell Odgers, Joanne N.; Cort, Michelle M; Costa, Ricardo J S; Cox, Gregory Roland; Crawshay, Siobhan; Ben Desbrow; Freney, Eliza G.; Gaskell, Stephanie K.; Hughes, David; Irwin, Chris; Jay, Ollie; Lalor, Benita; Ross, Megan L.; Shaw, Gregory; Periard, Julien D.; Burke, Louise M.

In: International Journal of Sport Nutrition and Exercise Metabolism, 2020.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Sports Dietitians Australia Position Statement: Nutrition for Exercise in Hot Environments

AU - McCubbin, Alan J.

AU - Allanson, Bethanie A.

AU - Caldwell Odgers, Joanne N.

AU - Cort, Michelle M

AU - Costa, Ricardo J S

AU - Cox, Gregory Roland

AU - Crawshay, Siobhan

AU - Ben Desbrow,

AU - Freney, Eliza G.

AU - Gaskell, Stephanie K.

AU - Hughes, David

AU - Irwin, Chris

AU - Jay, Ollie

AU - Lalor, Benita

AU - Ross, Megan L.

AU - Shaw, Gregory

AU - Periard, Julien D.

AU - Burke, Louise M.

PY - 2020

Y1 - 2020

N2 - It is the position of Sports Dietitians Australia (SDA) that exercise in hot and/or humid environments, or with significant clothing and/or equipment that prevents body heat loss (i.e., exertional heat stress), provides significant challenges to an athlete’s nutritional status, health, and performance. Exertional heat stress, especially when prolonged, can perturb thermoregulatory, cardiovascular, and gastrointestinal systems. Heat acclimation or acclimatization provides beneficial adaptations and should be undertaken where possible. Athletes should aim to begin exercise euhydrated. Furthermore, preexercise hyperhydration may be desirable in some scenarios and can be achieved through acute sodium or glycerol loading protocols. The assessment of fluid balance during exercise, together with gastrointestinal tolerance to fluid intake, and the appropriateness of thirst responses provide valuable information to inform fluid replacement strategies that should be integrated with event fuel requirements. Such strategies should also consider fluid availability and opportunities to drink, to prevent significant under- or overconsumption during exercise. Postexercise beverage choices can be influenced by the required timeframe for return to euhydration and co-ingestion of meals and snacks. Ingested beverage temperature can influence core temperature, with cold/icy beverages of potential use before and during exertional heat stress, while use of menthol can alter thermal sensation. Practical challenges in supporting athletes in teams and traveling for competition require careful planning. Finally, specific athletic population groups have unique nutritional needs in the context of exertional heat stress (i.e., youth, endurance/ultra-endurance athletes, and para-sport athletes), and specific adjustments to nutrition strategies should be made for these population groups.

AB - It is the position of Sports Dietitians Australia (SDA) that exercise in hot and/or humid environments, or with significant clothing and/or equipment that prevents body heat loss (i.e., exertional heat stress), provides significant challenges to an athlete’s nutritional status, health, and performance. Exertional heat stress, especially when prolonged, can perturb thermoregulatory, cardiovascular, and gastrointestinal systems. Heat acclimation or acclimatization provides beneficial adaptations and should be undertaken where possible. Athletes should aim to begin exercise euhydrated. Furthermore, preexercise hyperhydration may be desirable in some scenarios and can be achieved through acute sodium or glycerol loading protocols. The assessment of fluid balance during exercise, together with gastrointestinal tolerance to fluid intake, and the appropriateness of thirst responses provide valuable information to inform fluid replacement strategies that should be integrated with event fuel requirements. Such strategies should also consider fluid availability and opportunities to drink, to prevent significant under- or overconsumption during exercise. Postexercise beverage choices can be influenced by the required timeframe for return to euhydration and co-ingestion of meals and snacks. Ingested beverage temperature can influence core temperature, with cold/icy beverages of potential use before and during exertional heat stress, while use of menthol can alter thermal sensation. Practical challenges in supporting athletes in teams and traveling for competition require careful planning. Finally, specific athletic population groups have unique nutritional needs in the context of exertional heat stress (i.e., youth, endurance/ultra-endurance athletes, and para-sport athletes), and specific adjustments to nutrition strategies should be made for these population groups.

U2 - 10.1123/ijsnem.2019-0300

DO - 10.1123/ijsnem.2019-0300

M3 - Article

JO - International Journal of Sport Nutrition

JF - International Journal of Sport Nutrition

SN - 1526-484X

ER -