Most badass athletes (read: boxers, MMA guys, hockey players) use medicine balls in their training to improve kinetic chain movement, increase total body and core strength, and develop quicker reflexes. Come to the badass side yourself with this intense medicine ball workout. Use the tip to help you choose an appropriate size ball and only rest long enough between sets to catch your breath. At the end you should be sweaty, shaking and spent. Welcome to the world of badass.