“He decided that normal human sleep patterns may no longer be practical for modern lifestyles,” Currey said. “He decided he could train himself to sleep less and have vastly more time to do work.”
So Fuller experimented with a concept he called “high frequency sleep,” in which he would work until he started to feel sleepy – about six hours – and then cat nap for about 30 minutes, Currey said. He would do this around the clock without ever stopping for a longer rest.
“The other funny thing is he apparently got so good at this he could go to sleep instantly,” Currey said. “People in the room with him would be sort of freaked out he had an off switch in his head.”
Of course, he eventually stopped doing it because his wife complained.