Sorry, if you want to be "green", get off your butt and ride a bike.
QFT.
You may not electrically charge your heart, but you do need more food when you ride. How do you think that food gets to you? Gasoline-fueld [sic] trucks. Diesel railroads. Container ships burning heavy fuel oil. How do you think that food is raised? Diesel tractors, threshers and other farm equipment. The human body is also a very inefficient machine when it comes to the food we use as fuel. Your personal carbon footprint is far bigger than you think.
I'm thinking the human body is a little bit more energy efficient than any powerplant. Plus theres the health aspect.
x-posted
http://www.chiefdelphi.com/forums/sh...ad.php?t=57363
http://www.gothamist.com/2007/05/07/segways_still_r.php