Changes

Since E1 provides a relatively high amount of sleep, transition to this schedule from monophasic sleep is recommended to be done straight from monophasic (i.e., [[cold turkey]]). However, unlike other polyphasic schedules with less total sleep, learning to nap on E1 may take up to several weeks because humans have been observed to get used to sleeping monophasically for only 6 hours per night, sometimes for extended periods. Thus, it may take time for sleep pressure to build enough to induce sleep in naps. However, experienced nappers or those with high natural ability to fall asleep may still be able to fall asleep for the nap within a few days, or even right away in a few cases, albeit likely with high sleep onset.

Since E1 provides a relatively high amount of sleep, transition to this schedule from monophasic sleep is recommended to be done straight from monophasic (i.e., [[cold turkey]]). However, unlike other polyphasic schedules with less total sleep, learning to nap on E1 may take up to several weeks because humans have been observed to get used to sleeping monophasically for only 6 hours per night, sometimes for extended periods. Thus, it may take time for sleep pressure to build enough to induce sleep in naps. However, experienced nappers or those with high natural ability to fall asleep may still be able to fall asleep for the nap within a few days, or even right away in a few cases, albeit likely with high sleep onset.

Adaptation to E1 follows the same rules as any other reducing polyphasic schedules: it is necessary to go to sleep at the same time everyday for the nap and the core for the new sleep habits to stick. However, when the total sleep on E1 (6.3h) is very close to as personal monophasic baseline, the schedule can be more flexible right from the start.

Adaptation to E1 follows the same rules as any other reducing polyphasic schedules: it is necessary to go to sleep at the same time everyday for the nap and the core for the new sleep habits to stick. However, when the total sleep on E1 (6.3h) is very close to a personal monophasic baseline, the schedule can be more flexible right from the start.

==Difficulty==

==Difficulty==

Most of these issues, however, can be attributed to sleep debt prior to starting E1 adaptation, poor discipline, poor alarm system, or underestimation of personal monophasic sleep need.

Most of these issues, however, can be attributed to sleep debt prior to starting E1 adaptation, poor discipline, poor alarm system, or underestimation of personal monophasic sleep need.

It is worth noting that the failure to nap after several weeks (despite adhering to the schedule by the minute and all methods have been used to facilitate napping) may be attributed to the [[Wikipedia:Basic rest–activity cycle|BRAC]] in scheduling. Since sleep pressure on E1 is generally lower than on other schedules with less total sleep, ideal nap times in which the body feel drowsiness are only at a few certain spots in the day. This can causes the nap to work poorly because the body only tired either before or after nap. The problem would be resolved if the nap is moved to those spots.

It is worth noting that the failure to nap after several weeks (despite adhering to the schedule by the minute and all methods have been used to facilitate napping) may be attributed to the [[Wikipedia:Basic rest–activity cycle|BRAC]] in scheduling. Since sleep pressure on E1 is generally lower than on other schedules with less total sleep, ideal nap times in which the body feel drowsiness are only at a few certain spots in the day. This can cause the nap to work poorly because the body only tired either before or after nap. The problem would be resolved if the nap is moved to those spots.

Another common 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 [[4-Stages Adaptation Model#Stage 4|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 [[#Slightly modified core length|6.5h core variant]] section.

Another common 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 [[4-Stages Adaptation Model#Stage 4|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 [[#Slightly modified core length|6.5h core variant]] section.