Don't underestimate the gym ball. You'll often see them aimlessly rolling around the gym, an underused tumbleweed used more as a giant football for kick up practice than for abs exercises. Next time you see one lying around the gym remember that gym balls can be a remarkably beneficial way of improving muscle tone and balance. They are durable, lightweight and able to support a lot of weight. They're a valuable tool for varying workouts and allowing you to hit different muscles in different ways. So pick up that gym ball, don't kick it away, it could help you reach your goals quicker than you think.