@manualofreality: That heavy, half-awake feeling right after your alarm is a real, measurable state — psychologists call it sleep inertia, and hitting the snooze button is a reliable way to make it worse. Sleep inertia is the groggy transition period between sleeping and being fully awake, and research shows it's most severe when you wake up out of deep, slow-wave sleep (Tassi & Muzet, 2000). When the alarm rings and you drift back off, your brain starts settling toward those deeper stages again — and when the alarm rings a few minutes later, you can end up waking from deeper sleep than the first time. Meanwhile, the sleepiness chemical adenosine, which builds up while you're awake and clears out while you sleep (Porkka-Heiskanen et al., 1997), hasn't finished clearing. The scale of it is not small: a 2006 JAMA study found that cognitive impairment right after waking can be worse than the effects of 26 hours without sleep (Wertz et al., 2006). And a 2023 Stockholm University study on habitual snoozers linked the habit to a stronger morning cortisol spike on real-life mornings. The fix is mechanical, not motivational: put the alarm across the room so standing up isn't optional, drink water, and get direct daylight into your eyes — light is the strongest signal for shutting down melatonin and starting real alertness. Follow for more psychology that actually helps. #psychology #learnontiktok #explained #sleep

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Saturday 31 October 2026 22:07:19 GMT