6. Climb The Stairs
The stair climbers replicate the action of climbing a stairway. This device now also has modifications that replicate the pulling up action off the hands for a more through workout. The skiing and rowing machines work both the arms and legs simultaneously, with the rowing machine also working the back muscles.
The elliptical trainers are a cross between the stair climbers and the ski machines. The aerobic riders also exercise the arms and legs at the same time by the use of a simultaneous pull and push motion.