 and of course, as part of any exercise program, to keep you at a healthy weight. Now comes a first-of-its-kind study from researchers who study spinal pain. Adults in the study went nearly twice as long without their back acting up again if they walked regularly. About 800 million people worldwide have lower back pain. It's the leading cause of disability, and 7 in 10 people who recover have another bout within a year. Walking is low-cost, widely accessible, and a simple exercise anyone can do. I'm Cooper Lawrence, and this is all well and good.