Cardiovascular fitness is one part of?

Cardiovascular fitness is one part of a well-rounded fitness program. For healthy adults, the American Council on Exercise recommends some cardio training, some resistance training, and some flexibility training every week. How much cardio exercise? Thirty minutes of moderate-intensity cardio 5 days a week (i.e., brisk walking or a lower-intensity dance class) or 20 to 25 minutes of vigorous cardio training 3 times a week (running, a more vigorous dance class, an intense spin class or bike ride, etc.).