A Kettlebell is a weight with a handle. It is a very popular training tool at the moment partly because of celebrities who use them but also because the kettlebell specific movements tone the backs of the arms, stomach, thighs and bum all within the space of two or 3 exercises.
Most of the exercises are done standing or moving on your feet with the weight in your hands so it falls into the category of what personal trainers refer to as functional training.
The plyometric movements and posterior chain work make it ideal for anyone looking to improve their sports performance, particularly sports involving running. In addition it improves grip which is a weak point for many people who don’t even realise.
For full body strength and conditioning Kettlebell training is a great place to start.