Originally posted by tnorman
Running your PC would be pretty tough, but a laptop would be no problem; they use around 25W, maybe a bit more if you're using the CD/DVD drive or other peripherals.
I remember hearing about some Internet fitness club where you could websurf and use their terminals as long as you kept exercising (spinning, running, etc). I'm not sure if the exercise machines were hooked up to supply power to the terminals though.