Studies say just 30 minutes of walking a day can reduce several lifestyle diseases many Americans are living with. hide caption

toggle caption

Americans walk less than the citizens of any other industrialized nation, says Tom Vanderbilt. In this file photo from last summer, pedestrians and a cyclist cross the Brooklyn Bridge in New York City. Chip Somodevilla/Getty Images hide caption

toggle caption Chip Somodevilla/Getty Images

According to the Pedestrian Aggressiveness Syndrome Scale, if you find yourself "feeling stress and impatience when walking in a crowded area," you may have sidewalk rage. sculpies/iStockphoto hide caption

toggle caption sculpies/iStockphoto

NPR thanks our sponsors

Become an NPR sponsor