Does this happen to anyone else?

[LordMorpheus]

you've got it easy, I pass out sometimes. It just takes a while for your blood to settle down, I think it's more common/severe in tall people.

 

[tfinch2]

Originally posted by: tweakmm

Originally posted by: Chiropteran
You are going to die.

You are too sucker.

OP will sooner.

 

[Chiropteran]

Originally posted by: tweakmm

Originally posted by: Chiropteran
You are going to die.

You are too sucker.

The truth really hurts

 

[Demo24]

I would say its more of a "vision fade"

Happens to me at times. Drink more water and it should help some.

 

[desteffy]

That happens to me too sometimes. Usually only after I have had a really hard workout and am a bit worn out already.

 

[Number1]

Originally posted by: compnovice
When I stand up after sitting or lying for a long whille, I sometimes get dizzy and my body begins to convulse. I usually can control the convulsion if I try to make my hand and legs rigid.

This has been happening for a long long time so I guedd its not a big deal....

Have you talked to a doctor about this?
I don't think convulsing after getting up to fast is normal.

 

[compnovice]

Originally posted by: Number1

Originally posted by: compnovice
When I stand up after sitting or lying for a long whille, I sometimes get dizzy and my body begins to convulse. I usually can control the convulsion if I try to make my hand and legs rigid.

This has been happening for a long long time so I guedd its not a big deal....

Have you talked to a doctor about this?
I don't think convulsing after getting up to fast is normal.

nope... but this has been happening for more than 15 years.. it not regular though, so I never bothered to see a doctor.. guess I should..

 

[ViviTheMage]

sometimes i get dizzy when i do this...

 

[Raiden256]

Sounds like Orthostatic Hypotension.

Basically, when you stand up quickly, a relatively large amount of blood goes to your feet/legs just due to gravity. For that few seconds until your blood pressure is able to even things out, you have a relative lack of blood supply to your brain. Thus the lightheadedness.

If this happens a lot, you might look into whether you have a resting hypotension...

 

[cheesehead]

Major problem here. It went away after I lost a bit of weight.

 

[soydios]

When you lie down for long time (like watching an hour of utterly boring television), your heart rate slows down and your blood pressure drops, because it doesn't need to pump the blood very hard to get it around. When you stand up quickly, the blood doesn't have enough pressure to get up into your brain. Your cardiovascular system quickly compensates by speeding up the heart rate and constricting blood vessels in the legs. Your eyes are the most easily affected by a lack of oxygen, so this is where you notice the symptoms of the momentary pause in oxygen delivery the easiest. If you are concerned about this, just sit up for a second before standing.

In extreme cases, you can pass out if you jump up from a languid resting state. Never fear, if this happens, you will merely fall to the floor and automatically start breathing again. Once you wake up again, you should go to the doctor, though.

An extreme situation where this occurs is with fighter pilots. When they go into a very sharp turn, the experience up to 9 times the force of gravity. Even with "g-suits" that squeeze the legs to keep blood from pooling there and special breathing techniques, they sometimes "black out," where their vision narrows or is momentarily entirely lost for the same reason as we're discussing here: lack of blood flow to the head. If they hold the turn, they can pass out, which is very bad in a fast-moving jet that, often as not, isn't flying level.
My friend's father was a fighter pilot (stopped flying F-14s about 10 years ago), and he blacked out once. When he woke up 10 or so seconds later (an eternity when moving at 600mph), he was going supersonic over a city!