DualCore-0 / Segmented
Segmented sleep is the only biphasic schedule in the DualCore lineup (Siesta technically being DC0-Modified), having two cores (no naps), each with 3.5h of sleep. The cores are concentrated in night hours and no sleeps are present in the day. It is a very old polyphasic schedule, and is generally considered to be a bit harder, but still beginner friendly. Some people may also be naturally segmented sleepers, i.e., they naturally and consistently wake up during the night while on M0. dualcore schedules are highly recommended for such people.
| TST | 7h |
|---|---|
| Cores | 2 @ 3.5h |
| Naps | 0 |
| Difficulty | 0-2 |
| RSR Difficulty | 0 |
| Flex-potential | Moderate |
Mechanism
The cores are in the SWS and REM peaks in order to gain the maximum number of vitals. Both cores have some of both vitals, but contain lots of vitals of the respective peak. A 3h or more coregap is recommended to define 2 separate sleep blocks, avoiding making the body think you're interrupting a Monophasic sleep. Two things point to these core lengths:- Each core consists of 2 full sleep cycles and additionally contains an extra 30 minutes of sleep time to cover the statistically likely REM period.
- The possibility that the cycles extend to roughly 105mins (from the normal 90mins, see compression)
Difficulty
- Natural segmented sleepers should adapt easily or even effortlessly
- Non-Natural segmented sleepers may find more trouble adapting compared to other biphasic schedules, although it is still doable.
- Common issues include boredom in the night gap and sleep inertia, but usually only until adaptation is successful.