When Sagi and Autumn want tough, fat-chiseling cardio, these are their go-to moves. Short, but intense, this workout boosts aerobic capacity, power, and muscular endurance—without impacting your lean-muscle gains. This is how the Masters do cardio. Ever wonder what Sagi and Autumn's favorite cardio moves are? Find out as they tag-team this challenging workout that will get you shredded fast!