Strength and tone. This all-purpose stability ball is filled with free-moving sand, which offers 5 lbs of weighted resistance to maximize your workouts. The weight also adds to the ball's stability when you're using it to tone your abs. Perfect for all workout levels, this all-purpose ball also includes an instructional DVD to get you on the right track, plus a workout chart and an air pump.
As always, please consult your personal physician before beginning any diet or exercise program.