Relationship between blood pressure and exercise

I'd like to find out what relationship others have found, between their blood pressure and different kinds of exercise: long-term as well as short term effects. I'll go first: i have found that my bp is considerably lowered for a short time (a few hours i think: haven't investigated thoroughly) by doing something quite strenuous such as push-ups, chin-ups, or other weight-bearing exercise, to "failure": ie, you do it until you can't do another repetition. The effect seems to take place within minutes of the exercise. I haven't checked the effects of other forms of exercise on me, except to note that aerobic exercise seems to have little effect at all, at least in the short term. Oddly enough, the thing that seems to have the largest effect for me, is garlic.