Substances: Difference between revisions
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Because of the potential for it to disrupt sleep and its long half-life, the use of caffeine is discouraged on polyphasic schedules. In particular, it reduces the amount of SWS and REM sleep, which detrimentally affects the quality of naps and cores. On schedules with short wake gaps (other than Segmented), there is not enough time for caffeine to be eliminated from the system by the time the next sleep starts, so it inevitably causes disruption. The negative effects of caffeine on sleep significantly outlasts both the perceptible cognitive boost and the crash, affecting the next sleep block in a subtle but negative way. | Because of the potential for it to disrupt sleep and its long half-life, the use of caffeine is discouraged on polyphasic schedules. In particular, it reduces the amount of SWS and REM sleep, which detrimentally affects the quality of naps and cores. On schedules with short wake gaps (other than Segmented), there is not enough time for caffeine to be eliminated from the system by the time the next sleep starts, so it inevitably causes disruption. The negative effects of caffeine on sleep significantly outlasts both the perceptible cognitive boost and the crash, affecting the next sleep block in a subtle but negative way. | ||
== Alcohol == | |||
{{See also|wikipedia:Alcohol_use_and_sleep}} | |||
Alcohol can increase drowsiness, but it also reduces sleep quality by temporarily increasing the need for SWS and generally disrupting sleep structure. The effect is more pronounced in polyphasic sleep schedules, because the reduced core sleep duration meant there is less time to recover from the disruption in the later hours. | |||
During adaptation, using alcohol especially close to sleep is likely to negatively affect the adaptation process by disrupting sleep architecture. It may also cause oversleeps due to a sudden increase in drowsiness, setting back adaptation that way. | |||
==References== | ==References== | ||
