Are any of you that are having blood pooling issues athletes? I am a competitive runner and this sympton is probably the worse thing I am dealing with pertaining to my POTS. About 200 meters in to my run, my legs start to tingle and then become numb. I also experience painful cramping in my hips and upper portion of my legs. It almost feels like I need a shot of WD40 in my hip joints, they are so tight. My mind is telling my legs to run faster, but they are not capable of running the speed I used to be able to run. I am on Atenolol and Florinef and have tried Midodrine, which is a vasoconstrictor, but nothing seems to help. Please let me know if any of you are experiencing this problem and is there a solution or a fix for it?