Polyphasic sleep
Concept
A controversial sleep concept involving breaking sleep into multiple fragments (e.g., Uberman, 2-2.5 hours in a 24-hour cycle). Matt Mullenweg found it highly productive but stopped due to relationship impacts.
Mentioned in 2 videos
Videos Mentioning Polyphasic sleep

Matt Mullenweg Interview (Full Episode) | The Tim Ferriss Show (Podcast)
Tim Ferriss
A controversial sleep concept involving breaking sleep into multiple fragments (e.g., Uberman, 2-2.5 hours in a 24-hour cycle). Matt Mullenweg found it highly productive but stopped due to relationship impacts.

How to Build a World Class Network in Record Time | The Tim Ferriss Show (Podcast)
Tim Ferriss
A sleep strategy involving multiple short naps throughout the day; tried by Ferriss, found effective but massively antisocial.