Duration/sets: 2-minute rounds with 30-second break/3 sets Stand with your feet shoulder width apart. Place your hands under the tire. Bend at your knees and lift the tire up and flip it repeatedly, ...
These workouts also burn calories and improve fitness. One of Porcari’s studies found that the average boot-camper expended about 10 calories per minute during the training—not quite as much as ...
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