Linda, the 220-age doesn't work with everybody and it is meat to be a starting point. As an example I am 35 and my actual MHR is 195 and I've seen higher. if I use the formula 22-35 my MHR would be 185 and that is over 10 counts off on the other hand my friend is 42, his MHR from recorded races is 193, if we use 220-42= 178 also that is 15 counts off. At this point I would suggest to set your MHR at 135 and see if you get more realistic numbers. Also do another effort on that hill and try to measure your pulse to see if it is in line with your Garmin reading.




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