Discussion: Alter-G Anti-gravity training

Has anybody else ever heard of this? Seems like an interesting idea, although currently quite a big expense!

http://runtrails.blogspot.com/2006/08/alter-g-anti...

Interesting device. I also liked the YouTube link to a rather creative use of treadmills...
http://www.youtube.com/watch?v=pv5zWaTEVkI

Cool idea for training but i wonder how effective it would be for actual muscle conditioning. It would work ur heart and lungs but as your legs are not having to do that much work it would not be that beneficial, although this could be improved on in other aspects of training.

The movie is cool, note that it has been watched over 17 million times though

Wait a minute, the legs aren't working as hard, that I understand, but the lungs and heart are still doing the same amount of work?! Are we generating electricity with the extra output?