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Impact of heat and pollution on oxidative stress and CC16 secretion after 8 km run

Gomes, Elisa Couto; Stone, Vicki; Florida-James, Geraint


Elisa Couto Gomes

Vicki Stone


To investigate the acute effect of a hot, humid and ozone-polluted (O3) environment on lung inflammation and oxidative tress of runners performing 8 km time trial run. Using a single-blinded randomized design, 10 male athletes (mean V˙O2max = 64.4 mlO2 kg−1 min−1, SD = 4.4) took part in a time trial run in four different environmental conditions: 20°C + 50% relative humidity (rh) (Control); 20°C + 50% rh + 0.10 ppm O3 (Control + O3); 31°C + 70% rh (Heat); 31°C + 70% rh + 0.10 ppm O3 (Heat + O3). Blood samples and nasal lavage were collected post-exercise and analyzed for inflammatory, epithelial damage and oxidative stress markers. Data were analyzed using repeated measures ANOVA with Tukey’s post hoc test. A significant increase in CC16 concentration (P < 0.05) and GSH/protein concentration (P < 0.05) in the upper respiratory airways was observed following the 8 km run in the Heat + O3 trial compared with the control trial. There were no differences in the neutrophil counts between trials. No differences were observed for the other antioxidants analyzed. A hot, humid and ozone-polluted environment (0.1 ppm) elicits an early epithelial damage and antioxidant protection process in the upper respiratory airways of athletes immediately after performing 8 km time trial run.

Journal Article Type Article
Online Publication Date Jan 26, 2011
Publication Date 2011-09
Deposit Date Mar 13, 2014
Print ISSN 1439-6319
Electronic ISSN 1439-6327
Publisher BMC
Peer Reviewed Peer Reviewed
Volume 111
Issue 9
Pages 2089-2097
Keywords Public Health, Environmental and Occupational Health; Physiology (medical); Orthopedics and Sports Medicine; General Medicine
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