Why can a standing up for a long time, cause to hypotension?

[Dory]

What is the mechanism of the hypotension in this case.

 

[NomadicMedic]

Type "Neurally mediated hypotension" into the old google-box.

 

[Dory]

DEmedic Thank you for the answer, but can you be please more specific? (I saw there a lot of articles in this name)
I'm looking for the reason that sometimes people faint after being in the position of standing for a long time.
For example: "soldiers fainting during official ceremonies"
http://www.telegraph.co.uk/news/pic...ting-during-official-ceremonies.html?image=10

 

[DesertMedic66]

DEmedic Thank you for the answer, but can you be please more specific? (I saw there a lot of articles in this name)
I'm looking for the reason that sometimes people faint after being in the position of standing for a long time.
For example: "soldiers fainting during official ceremonies"
http://www.telegraph.co.uk/news/pic...ting-during-official-ceremonies.html?image=10

Do exactly what he said to do. Heck just type in what he said on Wikipedia and you will have your answer