Jillian Michaels, the trainer from NBC's The Biggest Loser and self-proclaimed TV's toughest fitness guru, runs through circuit training like a drill sergeant on caffeine. Her theory is to keep moving in between exercises to burn twice as many calories, so she cycles her team through sumo squats, mountain climbers, jump ropes, shoulder raises and bicycle moves without taking a breath. If she doesn't think one of her comrades is picking up his knees high enough, she makes everyone do 30 more, with a sadistic grin. As a result, you can almost literally watch the muscle burn. Michaels' Shape-Up Front DVD works out the chest, shoulders, triceps and quads. It also requires two props: a bench-style exercise step and light dumbbells. The DVD features include printable diet/exercise logs, nutrition tips and recipes. Despite a lower-level option, it isn't for anyone looking for a low-impact aerobic workout. --Ellen A. Kim Product Description I am glad you decided to make this commitment to change. Here's what we are doing today. We'll be working on the front of your body - for example your chest, shoulders, triceps and quads. The reason we are working these muscles together is two fold...first of all, these chest, shoulders trcips muscles are push muscles. They have the same function. So, it's good to work them out on the same day. The reason we're working our quadriceps in with our upper body is so that we're working our lower body and upper body - back to back. What this does is basically shunts your blood between your upper and lower body throughout the course of our workout - allowing you to burn twice as many calories. The key here is burning calories, melting off the fat and losing weight. So we keep it aerobic the entire time. Never stop moving, let's get started.... Jillian Michaels more info