Circuit training integrates several difference exercises which all target different muscle groups. One exercise may work on your arms, the next your core and the next on your legs- so you get an entire body workout in a short period of time using fun and engaging methods. Because you rest one part of the body whilst you target another you never waste time in the gym. This work out combines strength and cardio making it incredibly effective at burning fat during, and up to 48 hours after the workout.