I wore a doctor issued heart rate monitor for 14 days recently and today I received the results:
low heart rate was 40 bpm
average heart rate was 71 bpm
max heart rate was 168 bpm
I recall pulling off the side of the trail during my one and only mountain bike ride while wearing it. I was advised not to do any strenuous exercising while wearing it because of the risk of it detaching, which it did due to the sweat (I reattached the monitor afterward). I was doing the Brown Mtn climb and I pulled off because it felt like my heart was going to explode. Always wondered what my HR was when I felt like that. Now, I know.
No signs of any rhythm issues.
However, a first degree atrioventricular block was detected. If it advances to second or third degree in the future, I may need to wear a pace maker. My doctor says the what I have now is nothing to be concerned about.
Getting old sucks.