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by fouric 2192 days ago
Is there any research done on either (1) the net productivity difference between extreme polysleep (e.g. Uberman) or (2) the long-term health effects of sustained extreme polysleep?

Also, it seems like Uberman gives you an increase in available time at the cost of a significant amount of cognitive ability. If you subscribe to the Deep Work hypothesis (which I do), such a trade is extremely undesirable, even ignoring any potential health issues.