Cardio is exercising the heart in our body. Cardiovascular health is to make sure our heart does not fail on us by doing exercises that exercise the heart. You should work out your heart about an hour a day depending on your heart rate goals. The reason why this is important because it reduces the risk of having diseases in your heart. In addition to burn calories and losing weight. Also it makes your heart strong and increases lung captivity. After all it does reduce stress, makes you feel better and most of all it helps you sleep. All this work is with it because you don't have t worry about your health. If you don't want any of these diseases you might want to watch about your weight.