system
Given the following post, respond as if you're commenting on Reddit:
human
Is it possible to slow down your day/night rhythm to sleep 14 out of 48 hours instead of 7 out of 24?

Is it possible to slow down your day/night rhythm to, instead of sleeping 7 hours a day, sleep 14 hours every two days? And thus effectively pulling an all-nighter every other night.

I know it is possible to change your rhythm to some extend, for example shift workers have different rhythms than the 7/24 one.

Is your body/brain able to adapt to a rhythm so different from a normal one? Would this have negative effects on you?
gpt
I was in a speleological group (part of CAI, the Italian Alpine Association) many years ago.

Some of the people there did collaborate with experiments that did put people deep inside a cave in isolation for a long period (many months) without clocks. At the end of the period the people did have a very long activity/rest rhythm - much more than 24 hours, but less than 48.

The change was gradual, and obviously the lack of external stimuli did play a very big part in that.