Next Article in Journal
High-Protein or Low Glycemic Index Diet—Which Energy-Restricted Diet Is Better to Start a Weight Loss Program?
Next Article in Special Issue
Hydration Status, Fluid Intake, Sweat Rate, and Sweat Sodium Concentration in Recreational Tropical Native Runners
Previous Article in Journal
Glucagon Shows Higher Sensitivity than Insulin to Grapeseed Proanthocyanidin Extract (GSPE) Treatment in Cafeteria-Fed Rats
Previous Article in Special Issue
Rehydration during Endurance Exercise: Challenges, Research, Options, Methods
Article

Heat Acclimatization, Cooling Strategies, and Hydration during an Ultra-Trail in Warm and Humid Conditions

1
Inserm CIC1410, CHU Réunion, 97448 Saint Pierre, France
2
Inter-University Laboratory of Human Movement Biology, UJM-Saint-Etienne, Univ Lyon, EA 7424, 42023 Saint-Etienne, France
3
Institut Universitaire de France (IUF), 75231 Paris, France
4
Research and Scientific Support Department, Aspetar Orthopedic and Sports Medicine Hospital, Doha 29222, Qatar
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: William M. Adams
Nutrients 2021, 13(4), 1085; https://doi.org/10.3390/nu13041085
Received: 17 February 2021 / Revised: 21 March 2021 / Accepted: 24 March 2021 / Published: 26 March 2021
(This article belongs to the Special Issue Hydration and Fluid Needs during Physical Activity)
The aim of this study was to assess the history of exertional heat illness (EHI), heat preparation, cooling strategies, heat related symptoms, and hydration during an ultra-endurance running event in a warm and humid environment. This survey-based study was open to all people who participated in one of the three ultra-endurance races of the Grand Raid de la Réunion. Ambient temperature and relative humidity were 18.6 ± 5.7 °C (max = 29.7 °C) and 74 ± 17%, respectively. A total of 3317 runners (56% of the total eligible population) participated in the study. Overall, 78% of the runners declared a history of heat-related symptoms while training or competing, and 1.9% reported a previous diagnosis of EHI. Only 24.3% of study participants living in temperate climates declared having trained in the heat before the races, and 45.1% of all respondents reported a cooling strategy during the races. Three quarter of all participants declared a hydration strategy. The planned hydration volume was 663 ± 240 mL/h. Fifty-nine percent of the runners had enriched their food or drink with sodium during the race. The present study shows that ultra-endurance runners have a wide variability of hydration and heat preparation strategies. Understandings of heat stress repercussions in ultra-endurance running need to be improved by specific field research. View Full-Text
Keywords: hot temperature; hydration; dehydration; electrolyte balance; body temperature regulation; acclimatization; ultra-endurance running; running hot temperature; hydration; dehydration; electrolyte balance; body temperature regulation; acclimatization; ultra-endurance running; running
Show Figures

Figure 1

MDPI and ACS Style

Bouscaren, N.; Faricier, R.; Millet, G.Y.; Racinais, S. Heat Acclimatization, Cooling Strategies, and Hydration during an Ultra-Trail in Warm and Humid Conditions. Nutrients 2021, 13, 1085. https://doi.org/10.3390/nu13041085

AMA Style

Bouscaren N, Faricier R, Millet GY, Racinais S. Heat Acclimatization, Cooling Strategies, and Hydration during an Ultra-Trail in Warm and Humid Conditions. Nutrients. 2021; 13(4):1085. https://doi.org/10.3390/nu13041085

Chicago/Turabian Style

Bouscaren, Nicolas, Robin Faricier, Guillaume Y. Millet, and Sébastien Racinais. 2021. "Heat Acclimatization, Cooling Strategies, and Hydration during an Ultra-Trail in Warm and Humid Conditions" Nutrients 13, no. 4: 1085. https://doi.org/10.3390/nu13041085

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop