By NANCI HELLMICH USA TODAY Jan. 14, 2009 FONT SIZE Miami residents aren't all following the South Beach Diet. A recent survey by Men's Fitness magazine listed Miami as the country's fattest city. (Getty/ABC News) It is the fattest city in the USA and Salt Lake City is the most fit, according to magazine, which has been doing the annual analysis for 11 years. The results appear in the February issue....
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