Actually if you open up a health club you could get them to pay you!!!
Now that is a terrific idea. Next step is to hook up all the health clubs in the city: Distributed Physio Energy Generation. The juice can be fed into the grid as Green Energy can fetch a premium rate of $ 0,18 per KW-Hour to the customers. Since humans consume biomass as food the electricity is CO2 Neutral. Everybody will be happy.
This is a good idea for an AIM-Investment. The Cycle Power Company Shares will cycle with great volatility. Anyone care to start with some seed money? Vortex Engineering will get into it!