I have a treadmill connected to my meter.  If I run for 2 hours I can get 5 minutes of power free.  My normal weight is bang on 12 stonne.  My new system will get my weight down to around 5 stonne if I decide to use it.  I am going to sell this dietary and fitness system to health shops. It will be called the  "Treadmill and Electricity Diet".  I will make millions and save the planet at the same time. 
LOL!!!