Changes

With 2 core sleeps placed around the sleep peaks and 2 supplemental naps in the day, DC2 is similar to [[E3|E3-extended]] in sleep distribution and offers a decent napping frequency to learn the napping behavior. '''DC2 in a way resembles E3''', except that the first nap of E3 is now the second core in DC2.  

With 2 core sleeps placed around the sleep peaks and 2 supplemental naps in the day, DC2 is similar to [[E3|E3-extended]] in sleep distribution and offers a decent napping frequency to learn the napping behavior. '''DC2 in a way resembles E3''', except that the first nap of E3 is now the second core in DC2.  

The first core sleep is typically longer than the second core sleep to obtain an ideally sufficient amount of [[SWS]], while the second core has a lot of room for [[REM]] sleep. With a 3h [[Cores|core]] (2 full cycles) in SWS peak hours, SWS is likely preserved after repartitioning is completed, and SWS deprivation symptoms on DC2 are overall a lot milder than schedules with only 1-cycle core sleeps around SWS peak/night hours. The naps provide more alertness boost to sustain the long wake gap in the day as the core duration becomes shorter, and meet the remaining REM sleep requirements. The second nap on DC2 may not give any REM sleep, and just [[NREM2]] or trace SWS instead if it is placed in mid/late afternoon (e.g, after ~4 PM). Because of the reduced total core duration compared to that of [[DC1]], an extra nap has to be added to compensate for the reduced amount of REM sleep in the second core of DC2.  

The first core sleep is typically longer than the second core sleep to obtain an ideally sufficient amount of [[wikipedia:Slow-wave_sleep|SWS]], while the second core has a lot of room for [[wikipedia:Rapid_eye_movement_sleep|REM]] sleep. With a 3h [[Cores|core]] (2 full cycles) in SWS peak hours, SWS is likely preserved after repartitioning is completed, and SWS deprivation symptoms on DC2 are overall a lot milder than schedules with only 1-cycle core sleeps around SWS peak/night hours. The naps provide more alertness boost to sustain the long wake gap in the day as the core duration becomes shorter, and meet the remaining REM sleep requirements. The second nap on DC2 may not give any REM sleep, and just [[NREM2]] or trace SWS instead if it is placed in mid/late afternoon (e.g, after ~4 PM). Because of the reduced total core duration compared to that of [[DC1]], an extra nap has to be added to compensate for the reduced amount of REM sleep in the second core of DC2.  

In addition, DC2 is also a middle ground between the easier DC1 and the advanced [[DC3]]. The total sleep is not as high as DC1-extended and not as low as DC3, which is '''a favorable zone of total sleep for flexing sleep after adaptation'''. The total sleep is equivalent to [[E2]], but the splitting of core sleeps will provide a deeper core experience for the first core, and high likelihood for vivid/lucid dreaming in the second core as SWS is met in the first core. The wake gap between 2 cores is also large enough for certain favorite nighttime activities, including certain brainstorming or somewhat mentally taxing duties without having to worry about cooling down for the second core around sunrise hours too soon. It is also possible to have a 5-6h wake gap from the morning core to the first nap, and another ~4-5h to the second nap. 4 sleeps per day also renders the wake gap between each sleep more manageable than on E2 for instance. Skipping one nap as a result may be tolerable during adaptation, as long as this does not happen too often.  

In addition, DC2 is also a middle ground between the easier DC1 and the advanced [[DC3]]. The total sleep is not as high as DC1-extended and not as low as DC3, which is '''a favorable zone of total sleep for flexing sleep after adaptation'''. The total sleep is equivalent to [[E2]], but the splitting of core sleeps will provide a deeper core experience for the first core, and high likelihood for vivid/lucid dreaming in the second core as SWS is met in the first core. The wake gap between 2 cores is also large enough for certain favorite nighttime activities, including certain brainstorming or somewhat mentally taxing duties without having to worry about cooling down for the second core around sunrise hours too soon. It is also possible to have a 5-6h wake gap from the morning core to the first nap, and another ~4-5h to the second nap. 4 sleeps per day also renders the wake gap between each sleep more manageable than on E2 for instance. Skipping one nap as a result may be tolerable during adaptation, as long as this does not happen too often.