Changes

A [[biphasic]] [[Template:Polyphasic Sleep Schedules|schedule]], which consists of a longer [[Cores|core]] at night and a shorter core during the day.{{TNT|Siesta}}

A [[biphasic]] [[Template:Polyphasic Sleep Schedules|schedule]], which consists of a longer [[Cores|core]] at night and a shorter core during the day.{{TNT|Siesta}}<ref>[https://www.polyphasic.net/schedules/biphasic/ polyphasic.net]. Retrieved 20-11-2020.</ref>

== Mechanism ==

== Mechanism ==

Siesta sleep shares a lot of similarities with E1 - when research confirmed the existence of the '''circadian nadir''' around noon and early afternoon, both Siesta and E1 become very popular. However, it is most likely that humans naturally sleep in the non-reducing form of these schedules, meaning there is little to no sleep reduction involved. In the case of Siesta, a longer sleep in the nadir region is picked over the short nap of E1. Throughout the course of history, Siesta has been very common in Spain and many other countries around the world. In the context of polyphasic sleeping, Siesta contains 2 core sleeps, because the daytime sleep lasts for 1 full cycle, with much higher restorative power than a short nap. The longer daytime sleep paves the way for a shortened nocturnal sleep, which opens up for more evening time or earlier wake time in the morning. By having more than one core sleep, Siesta is capable of delivering very high sleep quality without compromising long-term health status. Like E1, a bigger portion of total sleep is dedicated to nighttime, where sleep pressure and the need to rest after a long day is often high, while the daytime sleep complements with a bit more sleep to fit into the circadian nadir. Usually, the wake gap from the end of the night core to the daytime core is anywhere '''between 6-9 hours'''.  

Siesta sleep shares a lot of similarities with E1 - when research confirmed the existence of the '''circadian nadir''' around noon and early afternoon, both Siesta and E1 become very popular. However, it is most likely that humans naturally sleep in the non-reducing form of these schedules, meaning there is little to no sleep reduction involved. In the case of Siesta, a longer sleep in the nadir region is picked over the short nap of E1. Throughout the course of history, Siesta has been very common in Spain and many other countries around the world. In the context of polyphasic sleeping, Siesta contains 2 core sleeps, because the daytime sleep lasts for 1 full cycle, with much higher restorative power than a short nap. The longer daytime sleep paves the way for a shortened nocturnal sleep, which opens up for more evening time or earlier wake time in the morning. By having more than one core sleep, Siesta is capable of delivering very high sleep quality without compromising long-term health status. Like E1, a bigger portion of total sleep is dedicated to nighttime, where sleep pressure and the need to rest after a long day is often high, while the daytime sleep complements with a bit more sleep to fit into the circadian nadir. Usually, the wake gap from the end of the night core to the daytime core is anywhere '''between 6-9 hours'''.