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Heat & dehydration

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4 papers 0 to 25 followers
By Suzanne Atkinson ER doc and triathlon coach
M F Bergeron, R Bahr, P Bärtsch, L Bourdon, J A L Calbet, K H Carlsen, O Castagna, J González-Alonso, C Lundby, R J Maughan, G Millet, M Mountjoy, S Racinais, P Rasmussen, D G Singh, A W Subudhi, A J Young, T Soligard, L Engebretsen
Challenging environmental conditions, including heat and humidity, cold, and altitude, pose particular risks to the health of Olympic and other high-level athletes. As a further commitment to athlete safety, the International Olympic Committee (IOC) Medical Commission convened a panel of experts to review the scientific evidence base, reach consensus, and underscore practical safety guidelines and new research priorities regarding the unique environmental challenges Olympic and other international-level athletes face...
September 2012: British Journal of Sports Medicine
Joshua H Guy, Glen B Deakin, Andrew M Edwards, Catherine M Miller, David B Pyne
Extreme environmental conditions present athletes with diverse challenges; however, not all sporting events are limited by thermoregulatory parameters. The purpose of this leading article is to identify specific instances where hot environmental conditions either compromise or augment performance and, where heat acclimation appears justified, evaluate the effectiveness of pre-event acclimation processes. To identify events likely to be receptive to pre-competition heat adaptation protocols, we clustered and quantified the magnitude of difference in performance of elite athletes competing in International Association of Athletics Federations (IAAF) World Championships (1999-2011) in hot environments (>25 °C) with those in cooler temperate conditions (<25 °C)...
March 2015: Sports Medicine
A C White, R M Salgado, S Schneider, J A Loeppky, T A Astorino, C M Mermier
New approaches to inducing altitude acclimation in a relatively short timeframe are needed, as it is not practical for many soldiers and athletes to gain access to specialized training facilities. Acclimation to one environmental stressor could enhance adaptation to various other stressors in animals and humans. This phenomenon has been described as cross-tolerance and involves the activation of common protective pathways. The purpose of this review is to discuss possible mechanisms involved in the cross-tolerance between heat and hypoxia...
November 2014: International Journal of Sports Medicine
O Hue, S Henri, M Baillot, S Sinnapah, A P Uzel
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 (Tgi) 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...
October 2014: International Journal of Sports Medicine
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