Blood pressure

I have often had anxiety in the past and have been working with that listening to inspirational audio books. 

I recently bought a blood pressure monitor because I had a sense that my BP was high. I notice that if I ride my bike or exercise it tends to go down quite a bit and stay down for a good while. I am trying to loose 10 pounds so that my BMI is within a good range and eat more fruits, vegtables and the right stuff. It's challenging to exercise in the winter and I have a desk job and am about 59 but I ride my bike while wearing ski pants, a sweater, wind breaker, and a balacava. 

 I listen to the Gary Null show 

I have the impression that high BP is actually above 140/90 because the medical profession redefined it from what the previous recommendations had been.