An exercise ball can also be used to help treat low back pain and to prevent future back pain episodes. The ball helps by strengthening and developing the core body muscles (the belt of abdominal and back muscles) that help to stabilize the spine (or vertebral column). An exercise ball creates instability to the exercise that normally wouldn't be there, forcing the body (and the core) to keep balanced. This strengthens the muscles that are doing the balancing. Exercise balls work for many types of athletes, including older people and pregnant women.