http://www.theatlantic.com/life/archive/2011/05/americas-fittest-cities/239565/
"Many people think fitness is better in warmer locations. Not so much. Each of the top five metros is pretty chilly, and the top ranked Twin Cities are among the coldest locations in the United States--certainly compared to warm and sunny LA, which languishes in 41st place. Our analysis found no correlation between fitness and January temp and a negative correlation between fitness and July temperature (-.49)."