I came across this article while doing a little browsing:
Mr. hood is attempting to set the world record for consecutive hours of riding a stationary bicycle. He expects to break the record sometime on Sunday, May 11, but wants to ride another 20 hours to make sure the record lasts a while. According to Guinnes rules he gets a 5 minute break every hour and can carry those 5 minutes over if he wants to skip one. He’s maintaining 12 mph which I find amazing. A more mind-boggling number is the number of calories he’s expected to burn….23,000!