Why do we feel groggy right after waking up?
Brain's Slow Startup
Why do we feel groggy right after waking up?
You open your eyes. The alarm is screaming. And your brain feels like it's been stuffed with cotton and dunked in syrup. Why does waking up sometimes feel like your head is still half-asleep, even when your body knows it's morning?
Here's the thing: your brain has gears, like a car. When you're deeply asleep, it's idling in first gear—running slow, quiet background systems. When you're fully awake, it's cruising in fifth gear—fast thoughts, sharp focus, quick reactions. The groggy feeling? That's your brain stuck between gears.
