Milliard Medicine Ball 2 lb. medicine ball is classic round for traditional use. Simple to use and easy to integrate into almost any training regimen. Great for use at the gym, in yoga, martial arts, or in your living room. Bounce it, balance on it, lift it, shake it side-to-side  make it a part of your day any way you can to improve your core strength and to increase your endurence levels. No moving parts to break, batteries to change or long manuals to read.