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Exercise in a hot environment influences plasma anti-inflammatory and antioxidant status in well-trained athletes.

Authors :
Sureda, Antoni
Mestre-Alfaro, Antonia
Banquells, Montserrat
Riera, Joan
Drobnic, Franchek
Camps, Jordi
Joven, Jorge
Tur, Josep A.
Pons, Antoni
Source :
Journal of Thermal Biology. Jan2015, Vol. 47, p91-98. 8p.
Publication Year :
2015

Abstract

Exercise in thermally stressful environmental conditions can enhance oxidative stress. We sought to measure the plasma antioxidant defenses and cytokine response together with oxidative damage post-exercise in a temperate versus a hot environment. The plasma concentrations of vasoactive endothelin-1 and vascular angiogenic growth factor were also evaluated. Male athletes ( n =9) volunteered to participate. The athletes randomly performed two bouts of treadmill exercise of 45 min at 75–80% of maximal oxygen uptake in a climatic-controlled chamber under two different conditions: temperate environment (10–12 °C, 40–55% humidity) and hot, humid environment (30–32 °C, 75–78% humidity). Venous blood samples were obtained immediately pre- and post-bout and on recovery after 2 h. Serum glucose, malondialdehyde and lactate concentrations were significantly increased post-exercise in hot but maintained in the temperate environment; these post-exercise values were significantly higher after exercise in hot than in temperate. Urinary 8-hydroxy-2′-deoxyguanosine concentration, plasma phosphocreatine kinase and catalase activities, creatinine and monocyte chemoattractant protein-1, and interleukin-6 significantly increased post-exercise in hot but maintained in temperate environment. The post-exercise circulating values of antioxidant enzyme paraoxonase-1 and endothelin were significantly higher in the hot than in temperate environment. Exercise in a hot and humid environment resulted in mild hyperthermia with elevated perceived exertion and thermal stress. Hyperthermic environment induced hyperglycemia, lactatecidemia and more cellular and oxidative damage than exercise in a temperate environment but also induced a post-exercise antioxidant and anti-inflammatory response in plasma. These results suggest that environmental temperature needs to be taken into account when evaluating exercise-related oxidative stress and inflammation. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03064565
Volume :
47
Database :
Academic Search Index
Journal :
Journal of Thermal Biology
Publication Type :
Academic Journal
Accession number :
100063140
Full Text :
https://doi.org/10.1016/j.jtherbio.2014.11.011