Getting regular exercise, especially aerobic exercise, is one of the best things you can do for yourself. It helps you cut your odds of getting heart disease. It's good for your blood pressure, cholesterol, weight, energy level, and mood, too, to name just a few of the benefits.
If you're not exercising, check in with your doctor first. She will let you know what you can do safely. If you take any prescription medicines, ask your doctor if you need to adjust them when you take your medicines.