I am just curious on the relationship between blood pressure and heart rate. I have high blood pressure, taking water pill. Blood pressure normal at rest. I have been running and do fitness program for a year. What puzzles me is my blood pressure drop right after running, down to 100/60. My normal is 125/85. Two hours after running, my heart still beat 100 times per minute. My blood pressure goes back to normal the next day. I suspect fast heart rate has something to do with blood flow, a fast pumping heart create turbulence flow, so the pressure is lower. My aerobic instructor said that muscle relaxes so pressure lower. But my blood pressure went back up with lower heart rate. Strange.