If you've spent any time in a health club -- or flipping through television advertisements -- you've probably seen plenty of fitness fads revolving around some new or redesigned piece of exercise equipment. You've probably also noticed it isn't long before this new piece of equipment disappears from the gym or, if you found yourself owning one, is relegated to the basement and buried beneath old clothes.
But one piece of exercise equipment has been around for hundreds of years and is still actively used in health clubs and in the homes of fitness buffs: the kettlebell. And its continued existence and increasing popularity are not only because of its functionality, but it also offers the combination of cardio and strength training.
