Put on your walking shoes and hit the Freedom Trail in Boston
                                
                                
                                    (Newser) -
                                    Whether it's their public parks, bike paths, or just because they're easy to amble around, more and more America cities are staking claims to promoting physically fit lifestyles. But some communities are more on the go than others, and as  ABC News  reports, a  Gallup  and  Healthways  list...