if your heart rate jumps 30+ bpm just from standing, that’s probably pots. orthostatic intolerance on its own is normal - everyone’s heart speeds up standing. but pots is when your autonomic nervous system can’t regulate properly, so ur heart stays elevated or keeps climbing even after sitting down.
it’s not dizziness, it’s measurable. check your resting hr lying down vs standing after 5 mins - if the gap is huge or keeps climbing, that’s what you show your neuro. this is also why lying down helps after a crash.
your autonomic system doesn’t have to fight gravity
anyway.