Exercise or increased physical activity, generally lowers both systolic and diastolic value of blood pressure by about 10 points. It may even happen as early as three or four weeks after increasing the physical activity.
Unfortunately for most people, a 10 point drop in their blood pressure isn't enough to have normal blood pressure, but benefits of exercise go beyond the reduction of blood pressure. It also, helps with weight control and improves blood cholesterol and glucose levels, so, that your risk of having complications of hypertension is lower, even if your blood pressure is not reduced to normal levels.

You, also, don't need to exhaust yourself to lower your blood pressure.
Many activities of daily life will do the trick, like taking the stairs and moderate yard or housework.
In fact, mild exercises, like walking or light aerobics, may reduce blood pressure just as much or even more than strenuous activities, like jogging.

Have you been prescribed some drugs for the high blood pressure or you are going through 3 or 6 months of lifestyle changes, first?

My doctor wants me to go through lifestyle changes first. Like I said, I was only on average 140/90 over a 24 hour day. She said if I can exercise more and lose about 20 lbs, it should come down. If not, then we'll have to take other measures. Possibly take me off the Birth Control Pill. But we'll see what happens in a few months or so.

Have you been done a lipid profile recently (tests for total cholesterol, HDL-cholesterol, LDl-cholesterol and triglycerides)?

On 2/21/2008, during my bike ride to Oakland, my BP was 141/93. On 7/2/2008, during my ride to Hollister, it was 153/91. On 5/24/1997, during my ride to Half Moon Bay, it was 174/104. On 6/13/1996, during my ride to Sausalito, it was 155/95, and on 6/28/1994, during my first bike ride to Gilroy, it was 124/86. The Oakland ride was about 70 km. The Hollister ride was 100 km. I did not get the distance for the other rides.