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Everyman 1, or E1, is part Everyman and part Biphasic, it trades one cycle from [[Special:MyLanguage/monophasic|monophasic]] for a single nap in the day. Because of the sleep cut from the core, [[wikipedia:Sleep_deprivation|sleep deprivation]] will gradually build up, and enable sleepers to eventually fall asleep in the nap. This process is likely a lot easier than learning to nap on a non-reduced Biphasic schedule (i.e., [[Special:MyLanguage/BiphasicX|Biphasic-X]]), because there is more sleep pressure generated from a shortened nocturnal core sleep.

Everyman 1, or E1, is part Everyman and part Biphasic, it trades one cycle from [[Special:MyLanguage/monophasic|monophasic]] for a single nap in the day. Because of the sleep cut from the core, [[wikipedia:Sleep_deprivation|sleep deprivation]] will gradually build up, and enable sleepers to eventually fall asleep in the nap. This process is likely a lot easier than learning to nap on a non-reduced Biphasic schedule (i.e., [[Special:MyLanguage/BiphasicX|Biphasic-X]]), because there is more [[Special:MyLanguage/sleep_presure|sleep pressure]] generated from a shortened nocturnal core sleep.

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Another common issue is the rather common [[Special:MyLanguage/stage 3/4 loop|stage 3/4 loop]] for beginners. This typically happens when a sleeper cannot complete the adaptation and get stuck in [[Special:MyLanguage/4-Stages Adaptation Model#Stage 4|Stage 4]] where, near the end of adaptation, the sleeper feels inconsistently adapted, excessively tired at certain times of the day, or [[Special:MyLanguage/sleep inertia|sleep inertia]] upon wakes. Because E1 likely has sufficient total sleep to gain all the needed [[wikipedia:Slow-wave_sleep|SWS]], being trapped in Stage 4 may be due to a slight REM deficit. A potential method to address this issue has been proposed, covered in [[Special:MyLanguage/#slightly-modified core length|6.5h core variant]] section.

Another regularly encountered issue is the rather common [[Special:MyLanguage/stage 3/4 loop|stage 3/4 loop]] for beginners. This typically happens when a sleeper cannot complete the adaptation and get stuck in [[Special:MyLanguage/4-Stages Adaptation Model#Stage 4|Stage 4]] where, near the end of adaptation, the sleeper feels inconsistently adapted, excessively tired at certain times of the day, or [[Special:MyLanguage/sleep inertia|sleep inertia]] upon wakes. Because E1 likely has sufficient total sleep to gain all the needed [[wikipedia:Slow-wave_sleep|SWS]], being trapped in Stage 4 may be due to a slight REM deficit. A potential method to address this issue has been proposed, covered in [[Special:MyLanguage/#slightly-modified core length|6.5h core variant]] section.

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Since E1 is overall a viable schedule to prepare polyphasic sleepers for more advanced schedules with the necessary napping skills to master the daytime nap, it does benefit a vast range of lifestyles. Its biphasic nature allows for long wake gaps between the nap and the core, and the nap can be fit into several occupations, including the mainstream 9-to-5 jobs. The nap can also be scheduled around noon in between any breaks or after work. Because of the short nap duration, it becomes possible to sustain the schedule long term, as the nap is not as long as a core (at least 90m), and as a result, it is less likely to be interrupted by daytime commitments. After adaptation, the nap window can be up to 4 hours with standard E1, and potentially wider with extended variants of the schedule.

Since E1 is overall a viable schedule to prepare polyphasic sleepers for more advanced schedules with the necessary napping skills to master the daytime nap, it does benefit a vast range of lifestyles. The biphasic nature of E1 allows for long wake gaps between the nap and the core, and the nap can be fit into a many daily schedules, including mainstream 9-to-5 jobs. The nap can also be scheduled around noon in between any breaks or after work. Because of the short nap duration, it becomes possible to sustain the schedule long term, as the nap is not as long as a core (at least 90m), and as a result, it is less likely to be interrupted by daytime commitments. After adaptation, the nap window can be up to 4 hours with standard E1, and potentially wider with extended variants of the schedule.

==Variants== <!--T:19-->

==Variants== <!--T:19-->

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[[File:E1 late nap 2.png|right|thumb|E1 with a nap after work]]

[[File:E1 late nap 2.png|right|thumb|E1 with a nap after work]]

For 9-to-5 occupations that do not allow any naps during lunch breaks, it is possible to schedule this E1 variant with a nap after work (~4-5 PM) and a core around midnight or slightly later, with a dark period 2h before the core. However, there has been less success with this E1 variant, because the late nap has a low chance to contain REM sleep, being in late afternoon and closer to [[SWS peak]]. This can make adaptation harder than the default variant. The long wake gap before the nap can cause bouts of tiredness during adaptation.  

For 9-to-5 occupations that do not allow any naps during lunch breaks, it is possible to schedule this E1 variant with a nap after work (~4-5 PM) and a core around midnight or slightly later, with a [[Special:MyLanguage/dark period|dark period]] 2h before the core. However, there has been less success with this E1 variant, because the late nap has a low chance to contain REM sleep, being in late afternoon and closer to [[SWS peak]]. This can make adaptation harder than the default variant. The long wake gap before the nap can cause bouts of tiredness during adaptation.  

===Late core=== <!--T:23-->

===Late core=== <!--T:23-->