Why do I snooze even after 8 hours of sleep?
Sleep quality matters more than quantity. Fragmented or poorly timed sleep — even at 8 hours — can leave you feeling groggy enough to snooze. Sleep inertia is also worst when you wake from deep sleep, regardless of total time.
Quality over quantity
Eight hours of fragmented sleep (multiple wake-ups, alcohol-influenced, screen-disrupted) is less restorative than 7 hours of solid sleep. The Pittsburgh Sleep Quality Index measures both dimensions.
Timing matters
If your alarm rings during deep N3 sleep, you will feel terrible even after a full night. Trotti (2017) shows sleep inertia is worst when waking from slow-wave sleep.
Audit your sleep
Common culprits: alcohol within 3 hours of bed, screens after 10 PM, inconsistent bedtime. Fix those first, and the snooze urge usually fades.
Sources
- Trotti, Nature and Science of Sleep, 2017. Sleep inertia: current insights
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