What is a kettlebell and what is the big deal with kettlebell workouts anyway?  A kettlebell is looks like a cannon ball with a handle and is normally made from cast iron.  Kettlebell workouts are intended to increase strength, endurance, agility and balance, challenging both the muscular and cardiovascular system with dynamic, total-body movements.  Kettlebells make it easier to do get the most out of each exercise that you do in your workouts.