A medicine ball is a weighted exercise tool that can be used to improve an athlete's strength, power and stability. One of the most versatile pieces of training equipment, medicine balls help promote a greater range of motion than most other forms of resistance training, and can also be used to improve explosiveness when throwing the ball at the end of a movement. Improve your overall athleticism by performing med ball exercises and workouts, provided by the top pro athletes and performance coaches, found exclusively at STACK.