Pedal power takes off as exercise produces electricity - Green House - USATODAY.com

"Business is really taking off," says Jay Whelan, CEO of The Green Revolution, a Connecticut-based company that retrofits bikes for spinning classes. Since April 2009, he has added devices to nearly 1,000 bikes at 60 gyms that convert the direct current created by pedaling into alternating current to be sent to the power grid. Most of his customers are on the West or East Coast or in Canada. The average cost: about $1,000 per bike.

Flashback: Can a Copenhagen CO2-hysteric hotel prevent hurricanes by giving out $35.00 vouchers for bicycle-generated electricity worth less than a penny?