Lose Weight with Jillian Michaels' Exclusive Interval System
3-2-1 Interval System
Lose up to 20 pounds in 30 days with Jillian Michaels, winning trainer on NBC's The Biggest Loser.
As your own personal trainer, Jillian will guide you through her exclusive 3-2-1 Interval System that combines cardio, strength training, and core work to help you lose weight fast and effectively.
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