When it comes to cross training, nothing compares to the durability, stability, and comfort provided by the Cybex 772AT Arc Trainer.  Statistically, the Cybex 770 Series burns more calories than any other cross-trainer/elliptical on the market. By utilizing Cybex’s patented arc motion, workouts are focused on more comprehensive muscle groups–particularly the quads and gules–that demand a larger number of calories when put to work.In addition to burning more calories, the Arc motion additionally reduces the stress caused by other ellipticals by allowing the knee and hips to move together, while keeping your foot comfortably under the knee.Equipped with a USB port, headphone jack, and iPhone/iPod charger built-in, listening to your favorite album or artist while working out has never been easier.