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Your biological clock is at fault
Our bodies follow a circadian rhythm, an internal clock that regulates sleep, body temperature, blood pressure and other vital functions on a 24-hour cycle.
Between 3am and 5am, our body is at its lowest level of activity:
Minimum body temperature
Blood pressure down
Slowed metabolism
This is the stage when sleep is deepest. But if something disrupts this balance – stress, anxiety, diet or environment – your body can interpret it as a signal to wake up.
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Stress and anxiety: common triggers
If you are prone to anxiety, this time of night can amplify your worries. Your brain, in a state of minimal rest, can suddenly be invaded by negative thoughts. It is often at this time that we dwell on our problems, feel overwhelmed by anxiety and fall asleep becomes difficult.
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