Changes

== Origin==

== Origin==

This schedule is named to differentiate itself from other established biphasic patterns ([[Siesta]], [[Segmented]] and [[E1]]). The suffix "-X" denotes variability in the daytime nap duration, which does not have to be the same every day.  

This schedule is named to differentiate itself from other established biphasic patterns ([[Siesta]], [[Segmented]] and [[E1]]). The suffix "X" is meant to denote variability in the daytime nap duration, which does not have to be the same every day.  

Despite its seemingly natural tendency of sleep behavior in humans (non-reducing biphasic, with a daytime siesta), it did not officially record any forms of adaptation or any adaptation success until early 2020, when there were a lot of successful attempts. These adaptations were confirmed with the currently used system of adaptation success criteria, like any other polyphasic schedules. '''The first detailed report''' as proof that this schedule works in the long term can be found [https://www.reddit.com/r/polyphasic/comments/eo8ml2/official_the_perpetual_polyphasic_schedule_final/ here] (45 days). A follow-up (~20 days after the first report) can be found [https://www.reddit.com/r/polyphasic/comments/ex008l/the_beauty_of_biphasic_sleeping_after_7_months/ here].

Despite biphasic sleep patterns being common in humans, the schedule did not have any documented adaptations until early 2020. The first detailed [https://www.reddit.com/r/polyphasic/comments/eo8ml2/official_the_perpetual_polyphasic_schedule_final/ report] was written by a user after 45 days on the schedule. A [https://www.reddit.com/r/polyphasic/comments/ex008l/the_beauty_of_biphasic_sleeping_after_7_months/ follow-up] was additionally submitted about 20 days after the first report. Afterwards, the schedule has seen numerous attempts, with many of which being successful.

==Mechanism==

==Mechanism==