Do exercise balls help build strength in back if you have disc issues and cant do impact exercise?

Core strength/stabil. Sitting on an exercise ball can help improve core strength & stability. Check out http://www. Gearfire. Net/10-reasons-to-use-an-exercise-ball-as-your-chair/, http://www. Dummies. Com/how-to/content/reaping-the-benefits-of-using-an-exercise-ball. Html & http://www. Popsugar. Com/fitness/Health-Benefits-Sitting-Exercise-Ball-20350907 for common themes of benefit.