This 47 minute cardio craziness is going to test your cardio.  If you’re looking for a physical and mental challenge, Cardio 1 is that workout.  Be prepared to sweat.  This workout is for all fitness levels.  Feel free to modify as much as needed.  Remember, your only competition is yourself.  The only thing you need for this workout is an elastic resistance band and the desire to be better today than you were yesterday.  Let’s go!