Walking is one of the easiest and least expensive ways to stay physically fit. It’s also a versatile form of exercise that can be done indoors (many malls and public buildings offer walking routes) or outdoors. Before starting a walking program, check with your doctor if you have a chronic medical condition or if you have had a recent injury. But don’t assume that you aren’t able to start exercise walking if you do have medical issues. Exercise walking can help control disease progression and relieve symptoms in people with cardiovascular disease and diabetes, and many people with arthritis or other musculoskeletal problems will experience symptom relief from a medically-supervised exercise walking routine.