What it means to run and how it lowers blood pressure is as simple as this: Run, and you're less stressed.
Stress causes hypertension in several ways. For instance, if you have high blood pressure because of too many things in your diet, you can lose some of that by eating more fresh fruits and vegetables. It also helps to exercise more, which lowers blood pressure as well.
Of course, there are other ways to reduce stress and help reduce your blood pressure. But when you are running, all of those ways are multiplied by about twenty-fold.
When you run, it lowers your blood pressure because of all of the above. Not only that but when you are running, you are making use of oxygen at a greater rate than when you are sitting around watching television. When you are running, you're using anaerobic (oxygen-rich) muscles, which burn up calories.
That means the more you run, the more calories you will burn. This will lower your blood pressure, and you will also look and feel great. You will feel like a runner. I think that's worth learning.