Naperville’s newest gym allows customers to lower their membership fees as they work out. Because the gym is solar and human powered, whatever energy you generate while in the gym, and thus for the gym, means you save on your membership fees. Continue reading here.

Naperville's Eco Gym located at the corner of Naper Blvd. and 75th St. Photo from chicagotribune.com by Suzanne Flynn, Neighborhood News Service