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== Cause ==

== Cause ==

WASOs occur more frequently during polyphasic adaptation, and are thought to be caused by the brain figuring out the new behavioral state times. In this framework, they are thought to cause no problems and are viewed as a part of polyphasic adaptation.

WASOs occur more frequently during polyphasic adaptation and are thought to be caused by the brain figuring out the new behavioral state times, as well as a sign for repartitioning. In this framework, they are thought to cause no problems and are viewed as a part of polyphasic adaptation.

In addition, there are people with the natural tendency to wake up at night, staying awake for 2-3 hours, and then falling back asleep. People experiencing this frequently are naturally inclined to dual core schedules. In addition, it has been observed that humans automatically develop a segmented sleep schedule, without the need for alarms or other restrictions, if the duration of the [[dark period]] is about 14h long.

In addition, there are people with the natural tendency to wake up at night, staying awake for 2-3 hours, and then falling back asleep. People experiencing this frequently are naturally inclined to dual core schedules. In addition, it has been observed that humans automatically develop a segmented sleep schedule, without the need for alarms or other restrictions, if the duration of the [[dark period]] is about 14h long.

Furthermore, WASOs can be caused by bad sleep hygiene, including caffeine consumption, as well as by advanced age.   

Furthermore, WASOs can be caused by bad sleep hygiene, including caffeine consumption, as well as by advanced age and can be a sign for many sleep disorders, such as [https://www.wikiwand.com/en/Sleep_apnea sleep apnea].   

== Effects ==

== Effects ==

== Treatment ==

== Treatment ==

Another way to treat WASOs effectively, and in fact exploiting them, is using polyphasic sleep. Depending on the amount and length of the WASOs, the fragmented sleep blocks can be adjusted to a fitting length and be integrated in a schedule.  

On [[monophasic]], WASO is a common issue. Those, who often wake up at night, may find polyphasic schedules with a higher segmentation more natural. This includes [[dual core]], [[tri core]] schedules, as well as [[QC0]]. Other schedules with only short [[cores]] and [[naps]], such as [[E3]], are also possible. [[Nap only]] schedules can fit in extreme cases as well (e.g. inability to stay asleep for more than ~20 minutes at a time).

On polyphasic, WASO often is a sign of the [[repartitioning]] and ongoing adaptation. It is supposed to disappear mostly after being adapted.

For about one wake during noctural sleep, with long lasting alertness afterwards, picking a schedule from the dual-core line is most fitting. For 2-3 frequent WASOs, a schedule from the Tri-core line can be chosen and for even more frequent WASOs a quad-core schedule might be the best option.

Waking up during sleep frequently may be a sign of the low sleep quality, at well as a sign of different sleep disorders, such as [[wikipedia:Sleep_apnea|sleep apnea]].  

Note that a decently long waking gap needs to be scheduled in order for each schedule to be effective.

 

For people with chronic WASO-insomia, they can even take place after polyphasic adaptation, but ideally the wakes do not last long and can be neglected if no sleep deprivation symptoms arise.  

== References ==

== References ==