This 300 pound thing is called an elliptical. LeeAnn has a gym membership and a years worth of experience using elliptical trainers. On her recommendations we pooled our funds and requisitioned this unit for our home gym.
I spent the better part of this afternoon assembling the parts. The flywheel is huge and the lower link arms, the bars with the treads for standing on pivot on hefty 1/2" I.D. sealed cartridge bearings doubled up no less on machined steel shafts. I am impressed with this piece of equipment. Viewing the mechanism from the side reminds me of the piston on an old steam engine, except in this case no steam, I'm going to be the engine. The foot treads travel in an elliptical pattern simulating a running movement except without the impact.
Useful amenities are a slot at the top of the control panel to hold a cell phone or music player and of course a cup holder. This will be a welcome alternative to This. Good call LeeAnn.