Wrigley's Extra chewing gum is making an appearance on NBC's "The Biggest Loser" and challenging American's to Step It Up with Extra Gum and take the Wrigley's Walk and Chew Gum Challenge.
Wrigley wants American's to collectively cut 10 million calories and walk 100,000 miles.
Hmmm, let's use the old mypetfat caloric calculator to see how many LBS are burnt when you burn 10 million calories.
If 3500 calories = 1LB of fat then burning 10 million calories =

STEP UP + SIGN UP
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