Other studies have linked chlorine and asthma but the new findings published in the European Respiratory Journal cast doubt on the idea outdoor pools are safer than indoor ones where chlorine vapors remains trapped inside an enclosed space.
“The more you swim, the higher the risk,” said Alfred Bernard, a toxicologist at Catholic University of Louvain in Brussels, who led the study. “What is new in this study is that we looked at outdoor pools for the first time.”
Asthma, which affects more than 300 million people worldwide, is the most common pediatric chronic illness. Symptoms include wheezing, shortness of breath, coughing and chest tightness.
Bernard and colleagues showed that outdoor pools are just as or more risky than indoor ones because harmful vapors remain at the pool surface and do not drift away.
And because children tend to spend more time in pools they are more likely to swallow chlorinated water or ingest vapors containing chemicals that attack the cellular barriers protecting the lung from allergens, Bernard said. – yahoo
I spent so many hours in outdoor pools as a kid. Perhaps if I hadn’t, I wouldn’t now get a little wheezy when the air quality reaches the “Sersiouly dangerous for all humans” level.