A Hong Kong gym and London dance studio are both powered by human power . Italian inventor Giuseppe Gambarota says human power is simple to use . The concept could be applied to busy places like train stations or into homes . There are some questions about the economic sense of human power .
A Hong Kong gym and London dance club are part powered by human power . Italian inventor Lucien Gambarota says human power is simple to use . The concept could be taken to busy places like train stations or into homes . There are some questions about the economic sense of human power .