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A member asked:
After crouching down fot 10 minutes i got up really quickly .felt dizzy and everything went black for a couple of seconds then i was ok .. help?
A doctor has provided 1 answer
Normal: When you go from crouched position to standing up your body needs blood to get to the head immediately. This means the heart pumps faster and harder. As we age the process does not go as smoothly so it is not uncommon to become lightheaded if we try to move too quickly!
Answered 6/11/2014
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