I haven't measured my blood pressure more than a few times in my life, so I don't think I have the necessary info to answer this poll, but I wanted to add something here. After I developed exercise intolerance and my POIS symptoms sort of shifted, in POIS mode I have a tendency to become severely dehydrated and have my blood pressure drop (as a consequence of dehydration, I believe, experiencing a wave of nausea, dizziness and cold sweat all over, with a horrible sensation of sickness). This happens around day 7 of POIS. I feel as if during a POIS episode my body was stuck with a very high metabolic rate, consuming nutrients and water at a crazy pace, but this is just my guess. The only thing I can be sure of is that I become very dehydrated even when my water intake doesn't change (1.5-2 liters per day). I have to drink big amounts of water to correct the situation, around 3-4 liters, twice what I normally need, and as soon as I do this the pressure drop episodes disappear.