Looking at alternative sleep schedules like this: Imgur: The magic of the Internet It strikes me that all of them seem to rely on having more, shorter sleeping periods which leads me to wonder if the opposite, fewer longer sleeping periods, has been tried. Since sleep is not homogenous and contains phases which vary in proportion according to which 90-minute cycle you’re at (Imgur: The magic of the Internet), this could make a difference.
The most convenient longer sleeping schedule I can think of is to go 36 hours awake and 12 hours asleep. You would be getting both the deepest Stage 4 sleep and long REM sleep. It could even be compatible with a 9-to-5 job.
Surely there must be an eccentric somewhere who’s tried it for a few weeks or months? Is there any data or even anecdotes on this? Would REM sleep keep getting ever longer in the cycles beyond the 5th one?
Preferably, we would distinguish between people feeling badly because a particular habit is bad vs feeling badly because they’re disrupting old habits or demanding more of their body than it’s used to. A lot of the people who do it might be doing it because they’re in desperate circumstances which may also muddy the waters.