Translations:Uberman/13/en

Without previous napping experience, naps will mostly contain light sleep or traces of SWS. As the REM need is not being fulfilled, REM pressure quickly builds up to high levels, causing a REM rebound. This usually happens around day 3-5. This will appear to suddenly alleviate the sleep deprivation, making people prone to overconfidence about the adaptation. After this, naps mostly contain REM, and SWS pressure starts to build up. SWS rebound usually occurs on day 7-8 and it is the hardest part of the adaptation where most people oversleep and fail their schedules. After avoiding this first crash, subsequent crashes once every 2-3 days also needs to be avoided. REM and SWS pressure gradually reaches an equilibrium and the schedule is finally stabilized. This can take weeks and some may need up to 6 weeks on the schedule.