− | A flexible nap only schedule with occasional monophasic days, which was suggested by Edgarvny in 2014<ref>Edgarvny (2014). ''[https://www.reddit.com/r/polyphasic/comments/2mmvf3/a_flexible_ubermanlike_schedule_that_works_for_me/ A flexible Uberman-like schedule that works for me]''. Retrieved 2020-11-27.</ref> and is an abbreviation of "No less than 4, no more than 20". The nap-only part of the schedule implies having naps no longer that 20 minutes with wake gaps in between, which last 4 hours or more. Thus the schedule becomes flexible, having 6 naps or less daily, which is a form of SPAMAYL with a few extra rules. Trying to adapt to this schedule, Edgarvny faced long oversleeps from time to time, which became the main feature of NL4NM20. A 8-hour monophasic core can be taken after a few days of nap-only, relieving sleep deprivation symptoms and returning a sleeper to the first or second [[4-Stages Adaptation Model|stage of adaptation]], which are milder and can make a wrong impression of being adapted. This state lasts a few more days, allowing to continue a nap-only schedule, but then Stage 3 kicks in, which is accompanied by intense sleepiness. The main consensus of the polyphasic community on NL4NM20 is the impossibility of adaptation, being stuck in the loop of entering the third stage of adaptation and returning back to the early ones by oversleeping, thus constantly experiencing prolonged sleep deprivation. Such irregular sleep schedule is also a way to destabilize circadian rhythm and sleep overall. | + | A flexible nap only schedule with occasional monophasic days, which was suggested by Edgarvny in 2014<ref>Edgarvny (2014). ''[https://www.reddit.com/r/polyphasic/comments/2mmvf3/a_flexible_ubermanlike_schedule_that_works_for_me/ A flexible Uberman-like schedule that works for me]''. Retrieved 2020-11-27.</ref> and is an abbreviation of "No less than 4, no more than 20". The nap-only part of the schedule implies having naps no longer that 20 minutes with wake gaps in between, which last 4 hours or more. Thus the schedule becomes flexible, having 6 naps or less daily, which is a form of SPAMAYL with a few extra rules. Trying to adapt to this schedule, Edgarvny faced long oversleeps from time to time, which became the main feature of NL4NM20. A 8-hour monophasic core can be taken after a few days of nap-only, relieving [[wikipedia:Sleep_deprivation|sleep deprivation]] symptoms and returning a sleeper to the first or second [[4-Stages Adaptation Model|stage of adaptation]], which are milder and can make a wrong impression of being adapted. This state lasts a few more days, allowing to continue a nap-only schedule, but then Stage 3 kicks in, which is accompanied by intense sleepiness. The main consensus of the polyphasic community on NL4NM20 is the impossibility of adaptation, being stuck in the loop of entering the third stage of adaptation and returning back to the early ones by oversleeping, thus constantly experiencing prolonged [[wikipedia:Sleep_deprivation|sleep deprivation]]. Such irregular sleep schedule is also a way to destabilize circadian rhythm and sleep overall. |