Cybex (NASDAQ: CYBI) developed the Arc Trainer, a unique machine, which, while built like and with a motion similar to an elliptical, provides a workout of its own. While an elliptical is a low impact machine, the Arc Trainer is a virtually no impact machine hile on an elliptical, some energy is spent on the joints and back. With the Arc Trainer, all of the exercisers energy is spent on their muscles and cardiac system. This all means a more grueling workout and more benefits for the exerciser. Cybex Arc Trainers come in 2 varieties: with moving arms for a total body workout and without moving arms lower body workout. Read About Cybex Arc Trainers