Chances are, you already know that physical activity is good for you. "Sure," you may say. "When I get out and move around, I know it helps me to feel and look better." But you may not realize just how important regular physical activity is to your health. According to the U.S. Surgeon General's Report on Physical Activity and Health, inactive people are nearly twice as likely to develop heart disease as those who are more active. This is true even if you have no other conditions or habits that increase your risk for heart disease. Lack of physical activity also leads to more visits to the doctor, more hospitalizations, and more use of medicines for a variety of illnesses. The good news is that physical activity can protect your heart in a number of important ways. Moreover, to get benefits, you don't have to run a marathon. Regular activity-something as simple as a brisk, 30-minute walk each day-can help you to reduce your risk of heart disease. This publication (the National Institutes of Health Publication No. 06-5714) will help you to understand the impact of physical activity on your heart, as well as the power of regular activity to help keep you healthy overall. It will also offer plenty of ideas on starting a physical activity program that will be both healthful and enjoyable. Just as important, you'll get tips for keeping up with the activity or activities you choose, since staying active over time is important to long-term health. So use this booklet often for information, ideas, and to keep you motivated.