If you have never used a balance ball as part of your fitness routine----think about trying one. I started using one when a physical therapist who was helping me with back issues taught me how to use one, and I have been exercising on it ever since. The hardest part about it is putting more air in the ball occasionally. The balance ball is great for building core strength (something we can all use more of, especially those of us with back problems). As always, check with your health care professional when starting a new exercise regime.