Given the real and growing threat to the nation's health posed by obesity, any show that can lead the way to a more fit America and provide entertainment at the same time would be a welcome addition for couch potatoes everywhere. In this umpteenth version of an unscripted elimination show, a dozen overweight contestants, nearly all in their 20s and 30s, were divided into two teams, each of which has its own trainer. The red team is led by Jillian Michaels, whose inspiration is a Marine Corps drill sergeant.

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