Elliptical Machines are the cardio machine of choice for people that need to get a quality cardio workout without straining their knees, ankles, and hip joints. Elliptical Trainers provide a low impact cardio workout while allowing you to reach a high intensity level at a very rapid pace. There are Elliptical Machines suited for home use as well as Light Commercial Ellipticals from a variety of manufacturer's for you to choose from.