Elliptical trainers are a group of stationary exercise machines that simulate climbing, cycling, running, or walking. Sometimes abbreviated ellipticals, they are also called elliptical exercise machines and elliptical training machines. The activities of climbing, cycling, running, or walking all cause downward pressure on the body's joints. However, elliptical training machines simulate these actions with only a fraction of the associated joint pressures. Elliptical trainers are found in fitness centers and health clubs, and increasingly inside homes. Besides providing a low-impact exercise, these machines also offer a good cardiovascular workout.