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=== Dawn REM naps ===
=== Dawn REM naps ===
[[File:E4densenaps.png|thumb|A [[E4|E4-modified]] variant with densely placed naps during the dawn hours]]
[[File:E4densenaps.png|thumb|A [[E4|E4-modified]] variant with densely placed naps during the dawn hours]]
It was suggested that it might be possible to have [[SOREM]] in naps during the dawn hours (close to the REM peak) even if they are placed close to each other, which is based on the observations how monophasic sleepers often keep dozing off during the morning, getting more and more REM each time, which is also a common technique for increasing dream recall in the lucid dreaming community<ref>[https://lucid.fandom.com/wiki/Wake_Back_To_Bed Wake-back-to-bed] technique.</ref>. There were also a few reported cases of getting SOREM in a couple of naps during the dawn hours with a short gap in between (around 60 minutes), which suggests the possibility of placing naps more densely on [[Everyman]] schedules or SPAMAYL.
It was suggested that it might be possible to have [[SOREM]] in naps during the dawn hours (close to the REM peak) even if they are placed close to each other, which is based on the observations how monophasic sleepers often keep dozing off during the morning, getting more and more REM each time, which is also a common technique for increasing dream recall in the lucid dreaming community<ref>[https://lucid.fandom.com/wiki/Wake_Back_To_Bed ''Wake-back-to-bed''] technique. Retrieved 2020-11-27.</ref>. There were also a few reported cases of getting SOREM in a couple of naps during the dawn hours with a short gap in between (around 60 minutes), which suggests the possibility of placing naps more densely on [[Everyman]] schedules or SPAMAYL.
Generally this method can be used for increasing time spent in REM. A dawn pronap often is used to achieve the same, but a few naps instead can have benefits for those, who tend to wake up after 15-20m of SOREM. This should also be beneficial for dream recall, since for some sleepers pronaps often end in light sleep, which makes more difficult to recall any dreams from the SOREM. Triggering SOREM more times and waking up from REM more times increases chances of the dream recall.
Generally this method can be used for increasing time spent in REM. A dawn pronap often is used to achieve the same, but a few naps instead can have benefits for those, who tend to wake up after 15-20m of SOREM. This should also be beneficial for dream recall, since for some sleepers pronaps often end in light sleep, which makes more difficult to recall any dreams from the SOREM. Triggering SOREM more times and waking up from REM more times increases chances of the dream recall.
== Unorthodox core length ==
[[File:Trishortext.png|thumb|A Triphasic-modified variant with compressed sleep cycles]]
A few schedules were suggested the sleep structure and classification of which would differ depending on the features of a sleeper's natural sleep architecture and inclinations. The relevant one is the individual possibilities of sleep cycle compression, which leads to a difference in the number of sleep cycles in some blocks of sleep for different sleepers. For example, a 60-minute block of sleep can have the structure of a nap for some people or be a full sleep cycle for others. Same goes for 4-hour core, which can be either compressed to 3 cycles or contain only 2. A difficulty sometimes appears when it comes to naming, because a schedule can contain more cycles than the standard one for some people due to a higher compression, at the same time having less TST.
An example of such controversial schedule is shown on a picture beside. With such low total sleep time and short blocks of sleep, most likely all of them will be compressed to cores, which makes this schedule [[Triphasic|Triphasic-modified]]. This is an interesting variant, since the sleep structure is quite unpredictable for different people, and it would be interesting to collect some EEG readings of this schedule from different sleepers. It also might be interesting to extend the dusk core to 3h or 3.5h. Higher TST would require less sleep compression, so for some sleepers with a low compression ability one or both of these 60m blocks might still have a nap structure, thus making this schedule [[E2|E2-modified]] or DC1-modified.
== Alternating schedules ==
=== ADE ===
[[File:ADE.png|thumb|Alternating E2 and DC1]]
This schedule was attempted<ref>Fireger (April 2019). [https://www.polyphasic.net/wp-content/uploads/2019/04/Alternating-schedules-Poly-Experiment-Report.pdf ''Failed Experiment: 48 Hour Alternating Polyphasic Sleep Cycle''].</ref> by a member of the polyphasic sleep community as an experiment on a 48-hour sleep cycle. It alternates between E2 and DC1, having almost the same total sleep time and waking up at the same time from every block of sleep. [[Dark period]] was kept the same every day as well. The only changeable variable was the length of the blocks of sleep.
However, the experiment wasn't successful. It lasted 9 days, but was finished after having a quite random sleep structure and experiencing tiredness at the time, when the sleeper was asleep a day before. This schedule didn't work since Everyman and [[Dual core]] schedules have a different origin and sleep mechanism, thus should be consistent from day to day for brain to adjust to it.
=== NL4NM20 ===
[[File:Nl4nm20.png|thumb|Alternating mono with nap-only]]
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>, which 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 longer. 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, thus 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.
== References ==
== References ==
