INVENTION #2 – Reclaiming Wasted Energy from Excercisers

Ever walk past a gymn and look in the window at all the useless activity?
That useless activity is powered by the consumption of EXCESS food.
It’s just plain wasteful.
It is my opinion that if you have that much extra energy that you can afford to go and run on a treadmill or lift weights or whatever, you are just eating too much.
Can something USEFUL not be done with all this extra energy?

I propose to hook these excercise machines to a generator and feed the electricity back to the grid.