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It's not much of a stretch to say that nobody knows how to build power, speed, strength, and flexibility better than Jillian Michaels. This comprehensive workout, which she created for Health, trains the muscles in a way that will bust through even the most persistent plateau. | Health.com

This comprehensive workout, which Jillian Michaels created for Health, trains the muscles in a way that will bust through even the most persistent plateau. Do it four times a week, paired with 20 minutes of high-intensity interval training, and watch your

6 simple exercises to lose belly pooch fast

6 simple exercises to lose belly pooch fast