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Researchers studied 300 people with ‘advanced sleep phase’.
Disney CEO Bob Iger wakes up at 4am most days and goes to bed between 10pm and 11pm. (Jesse Grant/Variety - Getty Images) As CEO of a $213 billion behemoth, Disney boss Bob Iger must be on his A-game.
Delayed sleep phase disorder (DSPD), more often known as delayed sleep phase syndrome and also as delayed sleep–wake phase disorder, is the delaying of a person's circadian rhythm (biological clock) compared to those of societal norms.
"Adjusting to longer-term patterns (e.g., a night owl needing to get up earlier) is trickier since your system acts as a rubber band, snapping back to its preferred biology as soon as you change ...
A circadian rhythm is an entrainable, endogenous, biological activity that has a period of roughly twenty-four hours. This internal time-keeping mechanism is centralized in the suprachiasmatic nucleus (SCN) of humans, and allows for the internal physiological mechanisms underlying sleep and alertness to become synchronized to external environmental cues, like the light-dark cycle. [3]
Waking up earlier in the morning increases the response. [11]Shift work: nurses working on morning shifts with very early awakening (between 4:00–5:30 a.m.) had a greater and prolonged cortisol awakening response than those on the late day shift (between 6:00–9:00 a.m.) or the night shift (between 11:00 a.m.–2:00 p.m.). [12]
"If your habit is waking up at the same time every day, it makes it easier for the brain to get used to that," he adds. Your waking time will also depend on how much sleep you got the night before ...
3. Stick to a Consistent Sleep Schedule. Having a consistent bedtime routine — going to bed and waking up at the same time each day — might significantly improve your overall well-being.