This 45 minute online workout video delivers the ultimate full body strength and resistance training for time pressed professional men and women. You can use the workout videos in the STX Cardio, Core and Lean Muscle Building series on their own to supercharge your gym routine or follow Sessions 1 through 12 for a challenging 4-week advanced fitness progression. Each intense circuit maximizes your workout to build muscle mass and burn fat, in the shortest period of time. iPod-ready workout.