Source: {"pile_set_name": "USPTO Backgrounds"}

Various types of aerobic exercise devices exist for developing different muscles. One form of device includes the use of adjustable steps to provide the user with the ability to alter the height of the exercise platform in accordance with the user's particular needs. Other types of aerobic exercises are also known including, for example, treadmills, steppers and stairmasters.
It would be desirable to provide a device which is inexpensive and easy to use, yet which permits the development of, for example, the chest, arms, back, shoulders, legs, abdominal and aerobic training in a simple and easy manner so as to enhance cardiovascular and strength gains. It would also be desirable to provide such a device which could be conveniently stored during periods of non-use by sliding the device under a bed or sofa.
It would further be desirable if such a device could be provided which permits different types of exercises taking place while the user is off the device but the user pulls cords on the device to enhance the exercises. It would further be desirable if such devices could also be used by persons having physical impairments such as being confined to wheelchairs.