2.Running
Though more challenging than walking, running is another heart-healthy physical activity that the human body is ready-made to do (barring physical limitations or injuries). In addition, it is one of the best ways to burn calories (a 150-pound person can burn 100 calories per mile), a bonus if you are also trying to lose weight to reduce your risk of heart disease. If you are a beginner to running, start out with a brisk walk and add 1 to 2 minutes of running every 5 minutes of walking. As you get more fit, you can increase the minutes you run until you don't need to walk in between.