Do you measure it in a chair similar to your doctor's office? I thought my couch was similar and I was careful to have my feet flat on the floor. But I "lowered by BP" by 10-15 by moving to the dining room table.
This is a self reported anecdata over many years. I do measure mainly on a couch, yes. Odd that reclining would be higher than sitting but I will try some variation. You'd think being more corpse like was net beneficial to BP
