So, I was practicing today at my inlaw's house, and while resting, I decided to take my blood pressure with thier automatic machine. The results: 132/.78 and my pulse was 72 BPM. Then I got the idea to take my blood pressure while playing a high C. 112/82 pulse 122 BPM. I am not surprised that my pulse went up, but I am very surprised that the systolic number went down and the diastolic number went up only slightly. Has anybody else tried this while playing? I would be interested to see if others have similar results.