Surefire is a lower body high-burn workout that will make your heart pump harder and your lungs work more. This is a cardiovascular and aerobic workout which means it will help you streamline your body and increase your endurance if you do it consistently, over time. Done as a one-off workout this is the perfect choice for that day when you want to help your heart and lungs improve their performance.
Extra Credit: 1 minute rest between sets.
