This sounds nice, but how much can you actually save with that? Would it be enough to run your PC or TV? Or maybe the lights? Did you check it? I mean you will need to make an investment first into all that equipment, which will cost a lot of money probably. Don't get me wrong, exercise is very important. But if you spend all your day at home and then exercise at home too it's not so good for your mind. It would be much better if you go outside to get fresh air while running. Plus working out outside of your home is free.