this is a product for all the people that have problem with the muscle tone. So far I have used it for my legs and its making me so tired. I am a paraplegic and it is very important for me to have to moment of the legs to save my muscles from getting degenerated. I have people that work on my legs and does passive movements, but not on can do it for so long as this machine can. I would suggest it to all that have no motor fuction in the lower extremities. THe only thing i would have love to see is a device that could lock the feet on the paddle. Something like a boot that would be attached to the pedal. but i am very happy with this machine, i wish i had it a long time back.