Elliptical trainers are a superior choice for many people. An elliptical provides a vigorous, aerobic workout comparable to jogging, but with far less stress on the joints. It works a wide variety of muscle groups, including your back, shoulders,...

Elliptical trainers provide a great cardio vascular workout but is low impact. That is there is less pressure, which is put on the joints of the legs. Thus it's not as strenuous as a treadmill. Therefore they are ideal for all age groups. Those in...