Cathe Friedrich's Hardcore Series: Hardcore Extreme DVD Hardcore Extreme workout DVD consists of three intense workouts each averaging approximately 70 minutes in length. a compilation of the following four DVD exercise workouts from the Hard Core Series: Imax 3, Low Max, Kick Max, and High Step Challenge. Workout #1 combines interval training with circuit training. Workout #2 combines high impact and low impact intervals. Workout #3 combines interval training with high impact conditioning drills as well as leg conditioning drills. you will need the following,A High Step, an Original Health Club Step, various dumbbells, an adjustable barbell&resistance band.