WHEN YOU THINK of a gym or a weight room, there's likely a very specific image in your head. An open space filled with heavy iron, benches, cable setups—and if you're in a big box, plenty of cardio ...

Sometimes it’s all in the design. One trip to the gym and you’ll quickly learn that weights come in many forms. The kettlebell, with its handle and bottom-heavy design, begs to be used for dynamic and ...