Kettleballs are cast iron weighted balls with handles on the top. Kettleballs come in a wide range of weights, typically from 2 to 100 pounds, and are designed for use in workouts.
Kettleballs originated in Russia for use by strongmen for training purposes and are now popular as part of strength training and total body workouts. The design of the balls offers a greater range of motion than traditional weights, such as dumbbells. Some exercise classes are built entirely around the use of kettleballs, while others integrate them into certain components of the workout. Kettleballs help build muscle and require balance and control, which helps improve core strength and overall balance.