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Why do many elderly people wake up at 3 a.m. and what might it mean for their rest?

As people age, their sleep architecture naturally shifts, making night waking—particularly in the early morning hours like 3 a.m.—a very common experience. — ### Why Many Older Adults Wake Up at 3 a.m. * **Circadian Rhythm Shift (Advanced Sleep Phase):** The internal biological clock shifts earlier with age. Melatonin (the sleep hormone) is released earlier …