Bike CommuteWashington, D.C., is the fittest city in the U.S., according to new rankings released by the American College of Sports Medicine. The ratings judged the country’s 50 most populous metro areas based on residents’ eating habits, access to recreation, and health conditions. The nation’s capital scored high marks for percentage of city land area for parks, number of citizens who bike or walk to work, average number of primary health-care providers, and physical education requirements. The District also has a relatively low number of smokers and residents with chronic health problems.