Lately, after sitting or “position horizontally” for a while, when I stand up, I feel dizzy.
This usually occurs after long exercise session (cycling or gym).
It’s as if my blood pressure is so low that blood does not get to the head fast enough.
If I rest a day or two, I don’t get these “fainting” sensations.
Any similar experiences?
What am I doing wrong (eating, drinking, vitamins)?