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The Scientific Reasons Behind These Nighttime Awakenings
Your body has an internal clock called the circadian rhythm that regulates sleep and wakefulness. Between 3 and 5 in the morning, the brain enters a lighter REM sleep phase, where it is easier to wake up. In addition, cortisol levels — the hormone that prepares your body for the day — naturally begin to rise around 3 a.m. Sleep studies show that small imbalances in this clock, such as daily stress, late caffeine consumption, or screen use before bed, can turn a normal transition into a full awakening.
Did you know that waking up at 3 or 4 in the morning is a clear sign of….see more.
