I was at the hospital lately visiting some friends and their newborn, and I came across one of those test-yourself blood pressure machines. My reading was 144/86 I believe, which the machine said was pretty high. 1. What causes high BP? 2. What can be done about high BP? Is there any simple changes I can make that will lower this, without resorting to medication? I'm a fairly fit 22 year old (5'9", 150lb), and I generally take decent care of myself. I know however, that I'm in below-average cardio shape. When running at an average pace, I'll get very winded after about 2 blocks. Will increasing my cardio fitness also lower my BP? I'm due for a physical in a few months, and I'd like to come out with a clean bill of health.