It’s called orthostatic hypotension and the easiest way to combat the blackout effect is by squeezing your leg and butt muscles as you get up. It keeps more blood in your head that way. It’s the same principle as the high g suits fighter pilots wear when doing combat maneuvers.
That blood deprivation where I don’t have the cognitive functionality to be miserable is the best few seconds of the day.
I have low blood pressure and am fairly tall so this happens most times I get up. Some times I black out completely and hit the deck.
A doctor said it’s a good thing because by the time I’m old, my blood pressure will be like a normal adult and risk of stroke will be basically nothing. I just got to make it there without splitting my head open.
You may be dehydrated.
Or have low blood pressure, low blood sugar, are affected by some types of medication (some antidepressants, muscle relaxers, etc)… if it’s new talk to your doctor, but it’s probably easy to deal with. I got told to eat more salt to deal with it, since I already stay pretty hydrated.
Second this. I drink like a fish, even water sometimes (/s), and still sometimes feel like the grim reaper’s looking at my report card when I stand up too fast.
it also just depends on how you sit. if you are sitting upright and more elongated, it shouldn’t happen. very different from say, sitting on the floor or squatting or sitting with a position where you legs are elevated to be the same height as your torso or higher.
your BP drops because all the sudden because heart has to fight gravity when it wasn’t doing it before.
How did you get a picture of my truck dash?
High score!