Air pollution and exercise - NBC Right Now/KNDO/KNDU Tri-Cities, Yakima, WA |

Air pollution and exercise

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UNITED STATES - A new study suggests walking in polluted areas may cancel the positive effects of that exercise, in older adults.

Researchers assessed over 100 seniors before and after a two-hour walk in a park, or on a polluted city street.

The park walkers had significant improvements in their lung and heart health, while the city walkers had only minimal gains.