A stability ball is a large, inflatable exercise ball that helps improve balance and strengthen muscles when used in workouts or as a replacement for a chair. Full definition
There is a lot of core work here to contain balance on stability ball. (christinebullock.com)
A client who is training for maximum improvements in strength and muscle size would probably not benefit from using stability ball for the majority of their exercises. (ballingerathleticperformance.com)
There are many different stability ball exercises for the butt, glutes, and core muscles. (best-leg-exercises.com)