- These machines are driven primarily by the legs as the feet move back and forth in an elliptical motion.
- Most models are dual action, which means that they have handlebars attached to each pedal link, to work both upper and lower body at the same time.
- Elliptical trainers use a resistance mechanism and the force required to move the foot pedals and handlebars to determine the intensity of the workout.
- The resistance is generated by either a magnetic or electromagnetic brake system and a flywheel which spins within the magnetic field; the closer the magnets are to the flywheel, the greater the resistance.
- The more powerful the magnetic field, the more resistance to the foot pedals and handlebars.