Changes

* A 30m nap may be at a disadvantage with the '''dream recall opportunities''', because of the SWS wakes. This suggests that lucid dreaming may not be as strong on a 30m nap than on a regular 20m nap. However, adaptation to Bimaxion or any reduced polyphasic schedule can turn a 30m nap into a huge reservoir for dreaming if the nap is scheduled to be in early daytime hours (dawn to early afternoon). Excluding pronaps that last for 30m long, the first nap on Bimaxion, for example, can proliferate a lot of REM sleep once SWS repartitioning has been stabilized in the core(s) and/or the second nap.

* A 30m nap may be at a disadvantage with the '''dream recall opportunities''', because of the SWS wakes. This suggests that lucid dreaming may not be as strong on a 30m nap than on a regular 20m nap. However, adaptation to Bimaxion or any reduced polyphasic schedule can turn a 30m nap into a huge reservoir for dreaming if the nap is scheduled to be in early daytime hours (dawn to early afternoon). Excluding pronaps that last for 30m long, the first nap on Bimaxion, for example, can proliferate a lot of REM sleep once SWS repartitioning has been stabilized in the core(s) and/or the second nap.

* On an '''"-AMAYL" polyphasic schedule''' (e.g, [[SEVAMAYL]], [[DUCAMAYL]]), a 30m nap can be occasionally added to the schedule, replacing the usual 20m naps occasionally, if it is still early in the day. The whole purpose is to simply avoid SWS wakes through this nap extension, without worrying about a great chance to oversleep the nap and turn it into a core. Because of the nap flexibility of these polyphasic schedules, it is expected that sleep onset for nap(s) is longer than on fixed, scheduled nap time on a schedule with the same sleep times everyday. As a result, in conditions that sleepers do not have adequate time to cool down and get ready for a certain nap, they can utilize a 30m nap to buffer the time it takes to fall asleep, while still granting them recovery from the nap. As an "-AMAYL" polyphasic sleeper takes a 30m nap, they can then effectively skip their next nap for the rest of the day, or schedule fewer naps later on to accommodate their commitments, strategically abusing the longer nap duration that a 30m nap offers.  For this reason, a 30m nap can be considered a "compound 20m nap".

* On an '''"-AMAYL" polyphasic schedule''' (e.g, [[Sevamayl]], [[DUCAMAYL]]), a 30m nap can be occasionally added to the schedule, replacing the usual 20m naps occasionally, if it is still early in the day. The whole purpose is to simply avoid SWS wakes through this nap extension, without worrying about a great chance to oversleep the nap and turn it into a core. Because of the nap flexibility of these polyphasic schedules, it is expected that sleep onset for nap(s) is longer than on fixed, scheduled nap time on a schedule with the same sleep times everyday. As a result, in conditions that sleepers do not have adequate time to cool down and get ready for a certain nap, they can utilize a 30m nap to buffer the time it takes to fall asleep, while still granting them recovery from the nap. As an "-AMAYL" polyphasic sleeper takes a 30m nap, they can then effectively skip their next nap for the rest of the day, or schedule fewer naps later on to accommodate their commitments, strategically abusing the longer nap duration that a 30m nap offers.  For this reason, a 30m nap can be considered a "compound 20m nap".

* In rare cases, some polyphasic sleepers may be more prone to 30m naps as they feel more "'''natural'''" than 20m naps. It is unknown as to why and probably comes down to preference and exposure to both nap durations.  

* In rare cases, some polyphasic sleepers may be more prone to 30m naps as they feel more "'''natural'''" than 20m naps. It is unknown as to why and probably comes down to preference and exposure to both nap durations.