Could this be a correlation/causation issue?
I know places like Buffalo have very high obesity rates (so much snow in the winter that it's difficult to get around) and also has a pathetic excuse for a pro football team along with a hockey team that the owner promised a Cup but has instead run into the ground.
The most successful teams of late-- Boston comes to mind-- seem to come from healthy, wealthy and wise (OK, Taxachusetts isn't that wise, but still) markets.