Extreme Metabolic Cardio Blast by JB Berns is the only workout that is performed in this catalog by the creator of Urban Rebounding. JB Berns and his cardio intervals are simply amazing and will elevate your heart rate even for the Intermediate to Advanced practitioners. His movements are basic in form but with his directional changes, which are optional, makes it a very challenging workout. The workout is a lot of fun because the choreography consists of simple movements, such as twists and jumping jacks. JB gives you options so Intermediate participants can do this workout every day.