Mayo Clinic Minute: How much exercise do you need?

If you turn on the TV, you're bound to see advertisements for a variety of exercise programs guaranteed to help you get in shape and improve your cardiovascular health. But how much exercise do you really need to be heart-healthy? And what type of exercise is best?

In this Mayo Clinic Minute, reporter Vivien Williams talks to Dr. Stephen Kopecky about exercise and what you need to do for good heart health.