Kettlebell Pilates is a relatively new workout routine that combines the core-strengthening focus of Pilates with the intense muscle building and cardiovascular benefits of kettlebells. Both require a certain level of muscular self-control, particularly in the hips, legs and trunk. The resulting combination can provide tremendous health benefits. The primary benefit from combining kettlebells with Pilates is because of the power of both systems in strengthening your core. Your core consists of your back muscles, abdominals, hips and glutes. Pilates exercises work out these major muscle groups, while the kettlebell adds a tremendous amount of additional resistance to these exercises. The strength-building benefits are not limited to your core: these exercises also affect your shoulders, biceps, triceps, quadriceps, calves and hamstrings, depending on the specific focus of your routine. According to a 2010 study done by the American Council on Exercise, a simple 20-minute kettlebell workout burns as many calories as uphill cross country or sprinting at a six-minute mile pace. This makes kettlebell swings one of the most efficient cardiovascular exercises in existence; combining this high-intensity workout with the arm and core exercises of Pilates increases the resistance and muscular control even further.