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Elliptical Trainers > Elliptical Trainers at eBay > 3D Elliptical Trainer

 
3d rendering of an elliptical trainer
Elliptical trainers first became available to consumers in the 1990s, but a more compact trainer was invented by Larry Miller in 2004.  Most elliptical trainers work both the upper and lower body.  Trainers can be self-powered (by the user) or plugged in to a source of electricity to provide less resistance to those who need it.
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<a href="http://www.ellipticaltrainers.us/elliptical-rendering.htm">Elliptical (3D Rendering)</a>
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Elliptical (3D Rendering) Picture