AI Article Synopsis
- The study investigated the impact of vigorous outdoor exercise during peak smog season on breath pH, a marker of airway inflammation, in adolescent athletes.
- Researchers measured breath pH before and after exercise in 16 long-distance runners over ten days, comparing results to a control group.
- Although no immediate effects from air pollution were found, the athletes' breath pH levels were unexpectedly low, suggesting that intense exercise might lead to airway acidification.
Article Abstract
Background: Vigorous outdoors exercise during an episode of air pollution might cause airway inflammation. The purpose of this study was to examine the effects of vigorous outdoor exercise during peak smog season on breath pH, a biomarker of airway inflammation, in adolescent athletes.
Methods: We measured breath pH both pre- and post-exercise on ten days during peak smog season in 16 high school athletes engaged in daily long-distance running in a downwind suburb of Atlanta. The association of post-exercise breath pH with ambient ozone and particulate matter concentrations was tested with linear regression.
Results: We collected 144 pre-exercise and 146 post-exercise breath samples from 16 runners (mean age 14.9 years, 56% male). Median pre-exercise breath pH was 7.58 (interquartile range: 6.90 to 7.86) and did not change significantly after exercise. We observed no significant association between ambient ozone or particulate matter and post-exercise breath pH. However both pre- and post-exercise breath pH were strikingly low in these athletes when compared to a control sample of 14 relatively sedentary healthy adults and to published values of breath pH in healthy subjects.
Conclusion: Although we did not observe an acute effect of air pollution exposure during exercise on breath pH, breath pH was surprisingly low in this sample of otherwise healthy long-distance runners. We speculate that repetitive vigorous exercise may induce airway acidification.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2292713 | PMC |
| http://dx.doi.org/10.1186/1476-069X-7-10 | DOI Listing |
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