Cardiovascular endurance. What the heck does that mean for my kids? According to Answers.com, here is a pretty accurate definition: The ability of the heart, blood vessels, and lungs to supply oxygen to working muscles during physical activity for a prolonged period of time. When I haven't exercised in a while I get that weird blood tasting feeling in my throat. I don't think it's actual blood, but my body is working overtime trying to pump blood to my muscles to get them oxygenated. The heart is a muscle and will get bigger and stronger the more you work it out. The AMA (American Heart Association) recommends kids get 60 minutes of moderate-vigorous aerobic-activity EVERY DAY. Examples: swimming, cycling, dancing, running, fast walking, soccer. Basically any activity that keeps your heart rate up for a sustainable amount of time. (at least 60 minutes everyday). A Few Cardiovascular Activities to play with your child: Frisbee Soccer Jump ...