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If you`ve eyed a cast-iron kettlebell at your gym and couldn`t imagine a use for it beyond doorstop, keep reading. Researchers found that people who did a 20-minute kettlebell workout torched almost 300 caloriesand that`s just for starters. When you factor in the muscle-sculpting impact (the calories burned after you exercise as your body repairs its muscle fibers), the total expenditure could increase by up to 50 percent.
Kettlebells also make traditional dumbbell moves more challenging. Their weight isn`t evenly distributed, so your stabilizer muscles have to work harder. Add definition to your shoulders and back; tone your butt, core, and arms; and shed a few dress sizes with this circuit from Sean Armstead, owner of Phenomenal Fitness in Chicago.
Starting with the first move, complete each exercise back-to-back without resting. Rest for one to two minutes, then repeat for a total of two or three circuits. Follow this routine two or three days a week, using a 10- to 15-pound kettlebell.
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