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
Want to work out but sick of your usual routine? Have a little fun when you use our name chart! Perform each exercise associated with each letter in your first, middle and last name. We promise you'll be sweating! Womanista.com
Yoga poses that emphasize core strength. Try them out one at a time, holding each for 30 seconds. Go through the entire sequence twice; for moves that are one-sided, do one side the first time through and the other side the second time through.