Ultracycling

Haha, well relatively. But indeed apparently he won't sleep anymore. Like in the long bikepacking races, he usually rides the last 800km or so without sleep, while sleeping regularly until that.

So Guinness is the authority, that keeps record of this?
http://www.guinnessworldrecords.com/world-records/91061-fastest-return-journey-from-lands-end-to-john-o-groats-by-bicycle-male