Kettlebells are very useful for developing well-rounded fitness. They stimulate more muscles predominantly through full body movements, resulting in the heart, lungs and muscles being trained simultaneously. The shape of the kettlebell makes it a fantastic tool for beginners as well as advanced athletes as it can swing, sweep, roll, flip, rotate and attach to additional pieces of equipment. Typical weak areas such as the wrists, shoulders and lower back can feel much more comfortable during kettlebell exercises while the intensity remains high.