Yes, Heath and nearly all bodybuilders use cardio to shed fat and get ripped -- but it's usually an hour of low-heart-rate, low-impact aerobics on the bike or elliptical and walking at 3.2 to 3.5 mph on a treadmill at a three-degree incline. Heath, like all men his size who compete at his level, can barely run a mile.Oct 3, 2014read more >>