I experience spells of dizziness while (and following) stretching. It happens when standing or sitting, if I stretch my neck, back, chest, torso or arms. It s especially bad when I try to correct or hold proper posture or stretch in a way that puts my arms out or above my head. I have always had good blood pressure at checkups, but I don t check it regularly at home. I have an office job, and try to get up to stretch and walk around every hour or two but considering some of my recent lifestyle changes (in the last 6 or 7 months) that have really affected my body, I fear may have contributed to some sort of hypotension.