The fittest cities in the U.S., and why

Photos: The fittest cities in America
Children ride bikes past the Capitol building in Washington, D.C. which topped the list as the "Nation's Fittest City," according to the annual American Fitness Index.
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Photos: The fittest cities in America
Minneapolis-St. Paul ranked second among fittest cities. Access to public parks was a new measure factored for in this year's rankings.
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Photos: The fittest cities in America
Competitors run on the boardwalk during a triathlon San Diego, ranked third on the list.
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Photos: The fittest cities in America
San Francisco ranked fourth.
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Photos: The fittest cities in America
The American River Parkway Bike Trail in Sacramento, California, which ranked as the 5th fittest American city this year.
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Photos: The fittest cities in America
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