Jackie's "Xtreme" workout, might not be as extreme as others, but that's exactly why I love this DVD. Instead of passing out in the first 5 min, Jackie gets you working right out of your comfort zone without causing you to feel sick. The moves are hard, challenging, but completely do-able, in a time frame that is perfect. When I put this DVD I don't get a feeling of dread like I do other, hour long, training DVDs. At one point Jackie says "I'm not giving you something you can't do" and she is right, even when I was struggling it was still something completely in my reach, and that's how she gets you to push.