The healthy human foot's outer arch may be more flexible than previously thought. iStockphoto hide caption
Studies say just 30 minutes of walking a day can reduce several lifestyle diseases many Americans are living with. iStockphoto.com hide 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
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