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Natural Wake-Up Reduces Morning Grogginess, Study Finds
10/19/2025
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Story summary
- The timing of waking, whether natural or via an alarm, affects morning grogginess.
- Waking naturally may reduce grogginess as the brain signals a transition from sleep.
- The brain's arousal system fluctuates in cycles and makes waking easier at certain moments.
- Sleep inertia can last 15 to 30 minutes after waking.
- Despite ongoing studies, the exact reasons for varying morning alertness remain unclear.
