2,197
edits
Changes
From Polyphasic Sleep Wiki
finished the article
== Increased sleep needs ==
== Increased sleep needs ==
Sleep needs can be increased temporarily, usually as an effect of needed physical recovery. Such cases include increased physical activity<ref>Erik Naylor, MS, Plamen D. Penev, MD, PhD, Larry Orbeta, BA, Imke Janssen, PhD, Rosemary Ortiz, Egidio F. Colecchia, MS, Moses Keng, MS, Sanford Finkel, MD, Phyllis C. Zee, MD, PhD (January 2000). ''[https://academic.oup.com/sleep/article/23/1/1/2749954 Daily Social and Physical Activity Increases Slow-Wave Sleep and Daytime Neuropsychological Performance in the Elderly.]'' Sleep, Volume 23, Issue 1, January 2000, Pages 1–9, <nowiki>https://doi.org/10.1093/sleep/23.1.1f</nowiki></ref><ref>Markus Dworak, Alfred Wiater, Dirk Alfer, Egon Stephan, Wildor Hollmann, Heiko K. Strüder (March 2008). ''[https://www.sciencedirect.com/science/article/abs/pii/S1389945707001815 Increased slow wave sleep and reduced stage 2 sleep in children depending on exercise intensity]''. Sleep Medicine, Volume 9, Issue 3, March 2008, Pages 266-272, https://doi.org/10.1016/j.sleep.2007.04.017</ref>, some substances, such as marijuana<ref>Barratt, E. S., Beaver, W., & White, R. (1974). ''[https://psycnet.apa.org/record/1974-24717-001 The effects of marijuana on human sleep patterns]''. Biological Psychiatry, 8(1), 47–54.</ref>
Sleep needs can be increased temporarily, usually as an effect of needed physical recovery. Such cases include increased [[Exercise|physical activity]]<ref>Erik Naylor, MS, Plamen D. Penev, MD, PhD, Larry Orbeta, BA, Imke Janssen, PhD, Rosemary Ortiz, Egidio F. Colecchia, MS, Moses Keng, MS, Sanford Finkel, MD, Phyllis C. Zee, MD, PhD (January 2000). ''[https://academic.oup.com/sleep/article/23/1/1/2749954 Daily Social and Physical Activity Increases Slow-Wave Sleep and Daytime Neuropsychological Performance in the Elderly.]'' Sleep, Volume 23, Issue 1, January 2000, Pages 1–9, <nowiki>https://doi.org/10.1093/sleep/23.1.1f</nowiki></ref><ref>Markus Dworak, Alfred Wiater, Dirk Alfer, Egon Stephan, Wildor Hollmann, Heiko K. Strüder (March 2008). ''[https://www.sciencedirect.com/science/article/abs/pii/S1389945707001815 Increased slow wave sleep and reduced stage 2 sleep in children depending on exercise intensity]''. Sleep Medicine, Volume 9, Issue 3, March 2008, Pages 266-272, https://doi.org/10.1016/j.sleep.2007.04.017</ref>, some substances, such as [[cannabis]]<ref>Barratt, E. S., Beaver, W., & White, R. (1974). ''[https://psycnet.apa.org/record/1974-24717-001 The effects of marijuana on human sleep patterns]''. Biological Psychiatry, 8(1), 47–54.</ref> or [[alcohol]]<ref>Irshaad O. Ebrahim, Colin M. Shapiro, Adrian J. Williams, Peter B. Fenwick (January 2013). ''[https://onlinelibrary.wiley.com/doi/abs/10.1111/acer.12006 Alcohol and Sleep I: Effects on Normal Sleep]''. Alcoholism: Clinical & Experimental Research, Volume 37, Issue 4, April 2013, Pages 539-708, https://doi.org/10.1111/acer.12006</ref>. External impact sometimes can significantly increase sleep needed, mostly [[wikipedia:Slow-wave_sleep|SWS]], which can shake the adapted state, again depending on the total sleep time of the schedule. This is the main reason why schedules with at least 3 sleep cycles are commonly recommended<ref>[https://www.polyphasic.net polyphasic.net]. Retrieved 07-12-2020.</ref> in the polyphasic community for those with intense physical activity, to guarantee the possibility to accomodate enough SWS in core(-s).
In some cases, [[wikipedia:Rapid_eye_movement_sleep|REM]] sleep can be increased as well, this includes depression<ref>Mathias Berger, Dieter Riemann (December 1993). ''[https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-2869.1993.tb00092.x REM sleep in depression—an overview]''. Journal of Sleep Research, Volume 2, Issue 4, December 1993, Pages 211-223, https://doi.org/10.1111/j.1365-2869.1993.tb00092.x</ref> or possibly intense mental activity<ref>J. De Koninck, D. Lorrain, G. Christ, G. Proulx, D.Coulombe (September 1989). ''[https://www.sciencedirect.com/science/article/abs/pii/0167876089900184 Intensive language learning and increases in rapid eye movement sleep: evidence of a performance factor]''. International Journal of Psychophysiology, Volume 8, Issue 1, September 1989, Pages 43-47, https://doi.org/10.1016/0167-8760(89)90018-4</ref>.
== Flexing ==
== Flexing ==
Polyphasic sleep schedules usually become flexible after adaptation. The possible level of flexing depends on the scheduled total sleep time and on the stability of adaptation. The sleep schedules, which reduce much sleep, generally are much less flexible than the ones with higher total sleep time, as flexing is known to decrease sleep quality, which is unacceptable for the schedules with extreme compression. When sleep is flexed too much, the adaptation can be destabilized or even ruined, as the compression can't be maintained anymore.
Also, the adaptation to flexing should be done gradually by incresing the flexing range slowly after the sleeper is already adapted and the sleep is stabilized. By flexing too much and being too fast, it is likely to destabilize adaptation as well, which happened to some members of the [[polyphasic discord]] community.
== References ==
== References ==
<references />
<references />
