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The third [[Template:Polyphasic Sleep Schedules|schedule]] in the [[Tri core|Tri-core]] line<ref name="lich" />, which consists of three [[cores]] and two [[naps]].{{TNT|TC2}}

{{TNT|TC2}} TC2 is a [[schedule]] in the [[Tri core|Tri-core]] line<ref name="lich" />, which consists of three [[cores]] and two [[naps]].

== Origin==

== Origin==

Tri Core 2, or TC2, is also one of the newer Tri Core prototypes. Made by [[LichterLoh]] from the [[Discord community]], TC2 is largely different from its predecessors [[Triphasic]] and [[TC1]].  

TC2 is created by [[Polyphasic Subreddit|Reddit]] user [[LichTerLoh]], detailed in a 2017 reddit [https://www.reddit.com/r/polyphasic/comments/6r20tv/i_got_asked_about_tricore_my_idea_and_how_it_works/ post]. TC2 is proposed as a way to [[gradual adaptation|gradually adapt]] to [[DC3]], though there has not been many attempts at either the schedule itself or the transition.

 

The idea behind TC2 is a compromise between distributing three cores throughout the day as in [[Triphasic]], and cramming all of them in the night as seen in [[TC1]]. Cores are placed in the late afternoon, late evening, and early morning, with two naps inserted in the day to maintain the alertness. The scheduling of the 3 cores resembles that of the 3 naps on [[Dymaxion]].  

== Mechanism ==

== Mechanism ==

The idea behind TC2 is not to cram all three core sleeps into the night like on TC1, or having all cores somewhat equidistant like on Triphasic. Since the sleep frequency of TC2 is the highest among the Tri Core family, which overall has a very low number of naps needed, all sleeps, including the cores, are spread out, with 2 cores being focused at night (and potentially take on the feature of [[Dual core|Dual Core sleep]], where the midnight core favors [[wikipedia:Slow-wave_sleep|SWS]], while the core around sunrise hours favors [[wikipedia:Rapid_eye_movement_sleep|REM]] sleep). The third core, located at late afternoon hours, coincides with the timing after usual hours of school and work as a way to give a long recovery after a long day.  

The second and third core sleeps are likely to resemble the two cores on [[Dual core]] schedules, with the first one containing mainly [[SWS]] and the second core containing mostly [[REM]]. The first core is likely to be mixed, similar to the day core in [[Siesta]] or [[Triphasic]]. The daytime naps help boost alertness levels during the day, and may provide a minor amount of REM sleep along with light sleep.

Because of a generally bigger wake gap between the cores, it may be easier to fall asleep in the 2 cores around [[graveyard hours]] (~midnight to 8 AM), which can lower the chance of [[Oversleep syndrome|oversleeping]] with subsequent naps and another core in the late afternoon. This late afternoon core likely behaves the same as the daytime core on Triphasic, giving mixed SWS and REM.  

So far, there are very few adaptations to TC2 because of its inconvenient scheduling, with multiple sleep blocks intruding normal social hours that require wake time.  

Because of a generally bigger wake gap between the cores, it may be easier to fall asleep in the cores, which can make the adaptation subjectively easier, and lower the chance of [[oversleeping]] in subsequent sleeps.  

So far, there are very few adaptations to TC2 because of its massively inconvenient scheduling, with multiple sleep blocks intruding normal social hours that require wake time.  

== Difficulty==

== Difficulty==

Up to date, there is very limited success with TC2, because of intrusive scheduling requirements, which leads to few actual adaptation attempts and therefore few data points to base the difficulty rating on.

There has been so far very few attempts and successes with TC2, because of intrusive scheduling requirements, which leads to few actual adaptation attempts and therefore few data points to base the difficulty rating on.

Based on the short duration of all cores, requiring a high level of repartitioning, the total high number of sleeps(increasing probability of oversleeping on any of them) and the necessity to spend most of the graveyard hours in DP, as well a moderate TST of 5,10 hours, TC2 should be rated moderate to hard.

Based on the short duration of all cores, which requires the splitting of SWS, and the 5 sleeps per day providing many opportunities for oversleeping, TC2 is likely significantly harder than schedules with similar totals like [[DC1]] and [[E2]].

== Lifestyle considerations ==

== Lifestyle considerations ==