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== Possible variations ==
== Possible variations ==
=== Extended sleep cycles ===
=== Extended sleep cycles ===
This option is considered standard.
This option is considered standard. It usually has 3h20m first core and 1h40m second core, theoretically making sleep cycles a bit longer (close to 100m). In fact, according to EEG readings of some community members, sometimes cycle lenght might be unchanged and be shorter, so there is more LNREM inserted in the end of cores.
=== Standard sleep cycles ===
This variation is rarely used and has a lower success rate since cores contain less light sleep/REM. It is considered more difficult than the standard one, and usually fits people with lower natural monophasic sleep baseline, about 6-7 hours or less.
=== Equal core length ===
Both cores are of the same lenght. This variation is viable, but rare. It is also considered more difficult than the standard one, since requires sleep cycle compression.
=== Swapped cores ===
In this variation the first core is swapped with the second one.
