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Strange Heart Rate Response to Exercise
billh99 posted:
I have a resting heart rate of about 40 (early morning) to 50 (late night). A maximum of HR of 170 (from stress test) which is 20 over the age predicted rate.

When I go to the Y, change clothes and put on my HR monitor it is usually around 70-75.

Last Saturday it was 55. And during all of my exercises it read about 10-15 beats below what it normally read for that effort.

And Sunday I tried to do a Joel Friel LATH test on my bike. That is going at as fastest speed as you can maintain for 30 minutes and recording the average HR for the last 20 min. Mine read 139, but based on my breathing and effort I would expect something like 150.

And last summer I had about 2 weeks where I notice that my HR was about 10-15 beats lower than typical for the same routes.

Monday and Wednesday bike rides gave me more expected HR.

None of the times that I have had the low HR have I seen and reduction in endurance or strength.

Has anyone else every experienced this?

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