Exercise--Timing Is Everything

People who exercise outdoors could have impaired lung function due to pollution. A report in the American Journal of Respiratory and Critical Care Medicine stated that even young, healthy non-smokers that exercise outdoors are at risk for poor lung functioning. Impaired lung function can occur even when ozone pollution is at levels that are considered safe according to the clean-air laws. There are many kinds of pollutants: ozone, particulates, nitrogen dioxide, carbon monoxide, sulfur dioxide and lead. Dr. Dennis Ownby, chief of allergy-immunology at the Medical College of Georgia says that it’s difficult to separate how each of these pollutants negatively impact the human body, because they all cause lung damage, heart attacks, cardiovascular disease and kill protective cells in the body. Constant exposure to pollutants eventually wears the body down and it loses its ability to fight back and protect the body. People who already have heart or lung problems are especially susceptible to polluted air. The cities that were the most polluted with ozone were:
• Washington, D.C.
• Richmond, VA
• Chattanooga, TN
• Charlotte, NC
Don’t use this as an excuse not to exercise, though. Ozone levels peak between 2 and 7 p.m., so schedule your outdoor activities, including exercise at the beginning and end of the day.
photo credit: bogenfreund