Looking for an ab routine to add on to an existing strength or cardio workout? Tack on 3 rounds of this 2.5 minute core circuit to feel the burn! Oh- and you can even do a round, while your Better Oats are cooking in the microwave.
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