The Weider PowerBell gives you the perfect combination of strength and cardio. A 20-min PowerBell Workout burns the same amount of calories as running on a treadmill at 6 MPH for 20 minutes. Because the PowerBell Workout incorporates strength training, you’ll burn an additional 507 calories from the Afterburn Effect. The PowerBell will get you lean, strong and cut fast. And, because it’s from Weider, you know it will work. Get the 20 lb. PowerBell, Workout DVD and Free Fitness Journal.