Cardiobell DVD - Volume 1: Our companion DVD's make training with your new Cardiobells a breeze. A follow along workout that takes the guess work out of Kettlebell training. Created by founder David Bellomo, this a simple, yet extremely effective way to gain Kettlebell expereince and get a great strength/cardio workout at the same time. Don't settle for cheap imitations. There is only one Original Cardiobell.