Translations:E3/13/en
From Polyphasic Sleep Wiki
Coming from monophasic sleep, SWS is spread out up to the third sleep cycle, or even in later cycles. When the core is suddenly cut short, SWS wakes may become frequent in the core. This leads to many reported oversleeps. Even worse, the naps can also contain SWS as adaptation progresses, possibly leading to harsh wakes and more potential oversleeps.
