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Fire up your metabolism with TV's top trainer, Jillian Michaels, and lose big with her fierce formula that adds strength and ab moves to dynamic cardio for increased fat loss. This 40-minute circuit workout blasts your heart rate with challenging intervals to turn up the burn and peel off the pounds. Whether you're just getting started or ready for a hardcore workout, this program will ignite your metabolism and incinerate fat to reveal a ripped, lean body!