Originally Posted by
rpenmanparker
Actually BP usually dips AFTER heavy exertion. It is fairly common in many people to be lightheaded from low blood pressure after a half hour workout on the treadmill near the anaerobic threshold. What are you doing asking a cycling forum about this. See your personal physician.
This, probably. There are these people called "doctors...."
Seriously, I check my blood pressure fairly often, because my family history is marginal and I wasn't able to exercise much for several months after surgery. In just a few minutes, it will vary 40 points. Just recently, for instance, it was 170/110 when I walked in the door and 123/77 10 minutes later. But see a doctor and put your mind at rest.