Fighting gravity is one of the most aerobically demanding things you can do. You need to move large muscles fast, have them recover on the go and repeat a high-impact performance. Cardio Max doesn't pull any punches. It will get you into the sweatzone fast and keep you there. It will push your muscles hard plus it will make heavy demands on your lungs. Great for levelling up.
Extra Credit: 1 minute rest between sets.