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
If you're trying to get back in shape, but don't have the time or money to invest in a gym membership, this collection of 15 Jillian Michaels at home workouts are just what you need to lose weight. And guess what? You can watch them all FOR FREE right here!