Walking on polluted streets cancels some of the activity's positive health effects, study finds

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Susan Perry Walking is a highly recommended form of exercise, particularly for older people, but doing it on polluted, traffic-congested streets can cancel out its beneficial effects on the heart and lungs, according to a British-American study published Tuesday in The Lancet.And it isn’t just individuals with pre-existing heart and lung conditions who experience those negative effects. They also occur among healthy people, the study found.Pollution likely has similar effects on people of all ages, the study’s authors add.They call on governments “to impose policies and measures that can reduce traffic pollution so that every individual can enjoy the health benefits of physical activity.”They also call for more green spaces in...

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