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When you finally get 8 hours of sleep and it genuinely starts making sense why they recommend it (europe.pub)
submitted 4 days ago by to c/memes@lemmy.world
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[–] 7 points 3 days ago (7 children)

People who think they're 100% fine if they drink it before 2pm should check out how half life works. Not the game, the pharmaceutical concept. It's super interesting.

Since it compounds, if you drink one cup in the morning, you will still have roughly 13% of that caffeine in your body at midnight. Both from the morning coffee, and the dregs over the last week. And that's if your body processes it at an average speed; some people have a long half life of 10 hours, and the math gets crazy. You end up with like 40% of a coffee in your blood at midnight, and it's a wonder why you can't sleep!

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  • [–] 1 point 2 days ago

    Speaking as a primarily coffee free person who drinks really seldom: that is true. I drink only when I had tough day prior and have to work with barely any sleep. It holds me like a superglue, duct tape and bunch of clamps. I drink a cup at around 7am but no late than 10am. I struggle to fall asleep at 10pm on the days I drink it. I still hear my heart beat and even if I'm tired, my brain can't u wind and slow down to the falling asleep speeds.

    Being decaf is all'n'cool and I feel great after a long streak of 8h+ sleeps each day. But once in a while I drink a cup and it shows. I can feel it. My wife can feel it. Coworkers probably can see it too. I am a different type of a person once I drink it.

    I guess people with high(er) caffeine tolerance are fine. But I can't imagine drinking more than 2 cups a day. It would screw me so much. People at work drink 7 cups a day. Makes me wonder every time how their life is going.

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  • [–] 7 points 3 days ago (5 children)

    Unless your brain gets a calming and mellowing effect from caffeine. Many ADHD people have that. Personally, I sleep very well to better with a little bit of caffeine but I can drink a Bang or other high caffeine energy drink and still zonk out without any struggles and sleep comfortably. It doesn't stop my sleep, but can help me be awake if I want to.

    (Half life still exists, I'm just talking about the whole "can't sleep with caffeine" thing)

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  • [–] 4 points 3 days ago (3 children)

    Same here for the most part, and I've been told a few times that it might be a sign of ADHD. I also have a low resting heart rate (low 40s), and I wonder if that plays a role.

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  • [–] 2 points 3 days ago* (last edited 3 days ago) (2 children)

    I used to have barychardia too but only in the low 50s. Got it down to 30 once during an experiment in my oceanography class. That was actually kinda painful.

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  • [–] 2 points 2 days ago (1 child)

    When I was running quite a bit, my resting heart rate dropped into the 30s in the early morning hours (while sleeping). I can't say that I've experienced 30 with my eyes open though - that had to be an interesting feeling.

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