In general, what happens to people's blood pressure when as they age?

Answer 1

It has 3 ways to go High, Low or just right.
Weight, diet and exercise contribute as well to lowering the blood pressure.
Blood vessels become less elastic with age. The "average" blood pressure increases from 120/70 to 150/90 and may persist slightly high even if treated. The blood vessels respond more slowly to a change in body position.
http://www.nlm.nih.gov/medlineplus/ency/imagepages/8693.htm

Answer 2

I think It gets higher or somethin. Grow-ups tend to have their blood pressure raise by various thing. (annoyence)