The Gaiam Mini Ab Ball is a versatile functionality tool. Ideal for targeting abdominal workouts, this ball can also be placed between the legs to introduce added resistance during lower body exercises. Help enhance core muscle activation, strengthen the back, and increase range of motion. Gaiam Mini Ab Ball Soft, lightweight 8” inflatable ball Help enhance core muscle activation, strengthen the back and increase range of motion Great for pre-and-post workout to activate the body, relax the back and aide with alignment Includes inflation straw and Exercise Guide Versatile Functionality: Ideal for targeting abdominal workouts, this ball can also be placed between the legs to introduce added resistance during lower body exercises