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Similar to E1, Siesta sleep takes advantage of the circadian dip around early afternoon. Siesta is considered to have 2 core sleeps, a long one at night and a short one in the day. In contrast to E1, the day core contains 1 full cycle, which is much more restorative than a short nap. The longer daytime sleep also allows for a shortened nocturnal sleep. Usually, the wake gap from the end of the night core to the daytime core can be between 6-9 hours.  

Similar to [[Special:MyLanguage/E1|E1]], Siesta sleep takes advantage of the circadian dip around early afternoon. Siesta is considered to have 2 core sleeps, a long one at night and a short one in the day. In contrast to E1, the day core contains 1 full cycle, which is much more restorative than a short [[Special:MyLanguage/nap|nap]]. The longer daytime sleep also allows for a shortened nocturnal sleep. Usually, the wake gap from the end of the night [[Special:MyLanguage/core|core]]to the daytime core can be between 6-9 hours.  

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However, unlike most standard scheduling where a core sleep would make use of a multiple of the 90m sleep cycle, the standard reducing Siesta (6.5h total) utilizes a 5h core, because last 30 is likely to contain extra [[wikipedia:Rapid_eye_movement_sleep|REM]] sleep. Based on the typical human sleep structure, it is expected that [[wikipedia:Slow-wave_sleep|SWS]] would be almost, if not fully covered in the first 3 full cycles of sleep (4.5h). On [[Special:MyLanguage/monophasic|monophasic]] sleep, the REM cycles are often longer than 90m, so the 30m may also help with waking up after completed sleep cycles.

However, unlike most standard scheduling where a core sleep would make use of a multiple of the 90m sleep cycle, the standard reducing Siesta (6.5h total) utilizes a 5h core, because last 30 m is likely to contain extra [[wikipedia:Rapid_eye_movement_sleep|REM]] sleep. Based on the typical human sleep structure, it is expected that [[wikipedia:Slow-wave_sleep|SWS]] would be almost, if not fully covered in the first 3 full cycles of sleep (4.5h). On [[Special:MyLanguage/monophasic|monophasic]] sleep, the REM cycles are often longer than 90 m, so the 30 m may also help with waking up after completed sleep cycles.

== Adaptation== <!--T:7-->

== Adaptation== <!--T:7-->

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[[File:Siesta Late Core.png|right|thumb|Siesta with late night core]]

[[File:Siesta Late Core.png|right|thumb|Siesta with late night core]]

Over the years there a few successful attempts with this variant. The main idea behind this setup is to allow a longer wake gap in the day to suit 9-to-5 jobs. A sleeper would have a core at night, go to work, and then a long sleep block to rejuvenate after work. The advantages of this schedule includes time awake in the evening and night hours. For this reason, this variant can accomodate for many lifestyles.  

Over the years there a few successful attempts with this variant. The main idea behind this setup is to allow a longer wake gap in the day to suit 9-to-5 jobs. A sleeper would have a core at night, go to work, and then a long sleep block to rejuvenate after work. The advantages of this schedule includes time awake in the evening and night hours. For this reason, this variant can accommodate for many lifestyles.  

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