Cardiovascular exercise is essential for the over-nourished who want to shed some pounds. It is also a key ingredient in cardiovascular fitness, which will help to build up endurance by sstrengthening the heart and cardiovascular system and improve circulation by helping the body optimize oxygen consumption. A good choice of cardiovascular exercises might be the treadmill, elliptical, rowing machine, stationary bike, or an aerobics class, just to name a few.