Sleep and gut health
Sleep inertia
Also called Morning grogginess
Sleep inertia is the grogginess and slower thinking just after waking, which usually fades within 15 to 60 minutes.
It is stronger after a short night, when an alarm wakes you from deep sleep, and when you wake at a time your body clock does not expect. Light, movement and a steady wake time reduce it; snoozing tends to make it worse.
Related terms
General information, not medical advice.