Want to know the secret for strengthening your core, protecting your joints, and getting more muscle-building benefits out of every workout? It’s stability. Or, a stability ball, to be exact. Also referred to as an exercise ball or a balance ball, stability ball exercises can take your workouts to the next level. The gym ball is so versatile it can be used to help someone who is just starting out in the gym as well as experienced exercisers. When used correctly, these simple spheres can help build a stronger, leaner and more resilient body. Their design allows for a number of powerful movements that simply aren't possible with other pieces of gym equipment.