Fitness coach Flex Cabral pits Isopure against one of his most intense workouts. Cardio workouts don't have to mean slogging away on a treadmill or stationary bike for hours. Brooklyn-based fitness coach, Isopure athlete , and founder of Trooper Fitness , Flex Cabral , designed this intense circuit workout to kick the dust off your boring cardio routine. This high-intensity workout uses functional, dynamic movement to keep your body guessing and your heart rate up. But how do you stay cool and hydrated during a workout this intense? Flex tests out Isopure Infusions, the company's latest protein powder innovation, to see how well it holds up against one of his most grueling routines. Flex Cabral's High-Intensity Agility-Boosting Workout Flex designed this workout specifically as a cure for your "lame treadmill run." These four circuits require flexibility, coordination, and dynamic movement to boost your athleticism, agility, endurance, metaboli