Thermoregulation, hydration and performance over 6 days of trail running in the tropics
| Autor: | André-Pierre Uzel, Michelle Baillot, Olivier Hue, Stéphane Henri, Stéphane Sinnapah |
|---|---|
| Přispěvatelé: | Adaptations au Climat Tropical, Exercice et Santé (ACTES), Université des Antilles et de la Guyane (UAG), CHU Pointe-à-Pitre/Abymes [Guadeloupe] |
| Rok vydání: | 2014 |
| Předmět: |
Adult
Male [SDV.OT]Life Sciences [q-bio]/Other [q-bio.OT] [SDV]Life Sciences [q-bio] [SHS.EDU]Humanities and Social Sciences/Education Body water Drinking Physical Therapy Sports Therapy and Rehabilitation Hematocrit Athletic Performance Severe dehydration trail running Body Mass Index Body Temperature Running Animal science Body Water Heart Rate Heart rate Medicine Humans Orthopedics and Sports Medicine Tropical Climate biology Osmotic concentration medicine.diagnostic_test Dehydration business.industry hydratation Thermoregulation Middle Aged Adaptation Physiological Gastrointestinal Tract tropical conditions Plasma concentration biology.protein Creatine kinase Female business [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition performance Body Temperature Regulation |
| Zdroj: | International Journal of Sports Medicine International Journal of Sports Medicine, Thieme Publishing, 2014, pp.906-911. ⟨10.1055/s-0033-1361186⟩ |
| ISSN: | 1439-3964 0172-4622 |
| Popis: | The purpose of this study was to investigate thermal response, hydration and performance over a 6-day, 142-km trail running race in tropical conditions. 9 participants competed in the 2011 Gwadarun (30°C±2.4°C and 82±4% RH). Data were collected on days 1, 4 and 6. Gastrointestinal temperature (T gi ) and heart rate (HR) were measured using portable telemetry units, whereas blood samples were collected for hematocrit, osmolarity, plasma concentrations, alkaline reserves and creatine phosphokinase. The performances expressed in speed were correlated with both total body water and body mass loss per hour (TBWL.h −1 and ∆BM.h −1 ), HR and changes in T gi per hour (∆T gi .h −1 ): the more water and mass the participants lost, the higher the HR and the greater the T gi change, and the better the performance. The ∆ T gi .h −1 was significantly correlated with ∆BM.h −1 , and the participants who lost the most mass had the greatest increases in T gi . None of the blood parameters demonstrated significant changes. The present study showed that well-trained acclimated runners performing a 6-day trail race in a tropical environment and drinking ad libitum did not demonstrate heat-related illness or severe dehydration. Moreover, high performance was associated with increases in T gi , TBW and BM losses per hour. |
| Databáze: | OpenAIRE |
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