www.kettlebells.com.au - Kettlebells are basically cast iron, cannonball-shaped weights with a single handle on top. Working out with these weights requires dynamic swinging movements, and are thus more fun than the static act of lifting weights or even jogging in place on a treadmill. All the lifting you will do in kettlebell workouts will make use of lots of muscles, including those in your arms, back, and core. This exercise will also strengthen joints, ligaments, and tendons, and the swinging action will help you stretch. As such, you get a full body workout that provides cardio, resistance, and flexibility training all in one go.