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Over a decade ago when I did not exercise my resting heart rate was so high that my doctor ordered blood tests. Nothing showed up so my fast heart remained an unresolved puzzle.

Since I have been exercising my resting heart rate has dropped to more usual levels. Yesterday I caught it down at 43, a surprise indeed as NIH regard 40 to 60 as being for well-trained athletes, though more commonly mine is low-50s. I also miss the occasional beat after exercise but some research suggests that too is fairly normal for people who work out. Still, being cautious I thought I should also check how fast my heart gets during exercise.

I considered working out on Friday. I really ought to have yesterday but I did not feel like it and am trying not to make it an unpleasant experience; besides, I had to head into Dundee for the afternoon. So, I postponed it again and today did not advance to the highest resistance level I have used in the past.

After my workout this morning my heart rate was over 150. If we wave our hands a little and take my maximum heart rate as 175 and my resting heart rate as 55, so my reserve is 120, then by the Mayo Clinic's guidelines this looks as if I am brushing the top end of my training zone for vigorous exercise. The American Heart Association says that, once used to working out, you may be able to exercise comfortably at up to 85 percent of your maximum heart rate. This tells me that I am certainly pushing myself enough and ought not increase the intensity any further which is great as it does not feel too bad at this level.

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Mark T. B. Carroll

September 2017

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