Translations:E1/14/en

Another regularly encountered issue is the rather common stage 3/4 loop for beginners. This typically happens when a sleeper cannot complete the adaptation and get stuck in Stage 4 where, near the end of adaptation, the sleeper feels inconsistently adapted, excessively tired at certain times of the day, or sleep inertia upon wakes. Because E1 likely has sufficient total sleep to gain all the needed SWS, being trapped in Stage 4 may be due to a slight REM deficit. A potential method to address this issue has been proposed, covered in 6.5h core variant section.