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Clinical Trials Update
February 27, 2018

Air Pollution May Limit Health Benefits of Walking

JAMA. 2018;319(8):761. doi:10.1001/jama.2018.1198

Short-term exposure to traffic pollution negates the cardiopulmonary benefits of walking for healthy individuals, those with chronic obstructive pulmonary disease (COPD), and those with ischemic heart disease, according to a trial published in The Lancet.

Study participants were age 60 years or older and included 40 healthy volunteers, 40 individuals with stable COPD, and 39 with stable ischemic heart disease. Participants were randomly assigned to walk for 2 hours along a traffic-polluted commercial street in London or through a traffic-free park. The walk was repeated 3 to 8 weeks later.

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