Fit Generator / Generator

We go to the gym to bulid our perfect bodyshape or lose weight.We burn extra energy to keep fit,but where does the extra energy go？It transform into heat and waste.What a pity！
Fit Generator can recircle the energy you waste.Settle it on the counterweights,and when
you are doing exercise，you can generate electricity with it.So when you go to the gym,not
only you can keep fit but also saving electricity and make the world better.