It burns a high amount of calories in a short amount of time, activates large muscle groups and is also good for training cardio endurance for marathoners and triathletes. Hayley Zawadzki More Quotes by Hayley Zawadzki More Quotes From Hayley Zawadzki As a warm-up, it's a great way to loosen up the body, break a quick sweat, our trainers use it in circuit training as a cardio burst between strength training intervals. Hayley Zawadzki technology
