There is medicine in those balls, but not the kind that comes in a bottle. This healing medicine of this ball came from the role it played in rehabilitation and sports medicine. The powerful medicine that is activated by the strength of your will and sweat just like it did almost 3,000 years ago in Persia when Persian wrestlers used bladders filled with sand for their training. Today, medicine balls are generally made of leather, nylon, vinyl, rubber, and polyurethane (flexible … [Read more...] about Three Killer Medicine Ball Core Exercises