Walking for health and fitness is the easiest way to get in shape and stay in shape! Why am I so enthusiastic about walking for health and fitness? Well, I’ll give you 3 reasons; it’s free, it’s easy to do, and it’s easy on your body’s muscles, joints, and bones! And, there’s no question that walking is good for you. Walking is an aerobic exercise, which stimulates and strengthens the heart and lungs, thereby improving the body’s utilization of oxygen.