My question is, should I be concerned that even when I am pushing myself to the point extreme discomfort my Heart Rate is lower than anyone I know? An example is last Monday I rode a group ride where TR says I rode 49 minutes, at 97% of FTP and my HR average was 115. And this isn’t something that has just occurred, it has been my experience for the last few years.
My resting heart rate, taken while sitting in a dentist’s chair, is usually around 56 BPM. Sitting at my desk at work it is mid 60’s. While exercising I find it very difficult to push it above 130. Most of my Sweet Spot Training is around 108 to 112. Last summer I rode a double century and rode at an average pace of 81% of FTP, my HR averaged for the entire ride 108.
I should add that I am 58 years old, I have been riding my bicycle, non-competitively, since my early 20’s. I average 6 to 12 hours per week of cycling. My normal cadence is 75 to 85 unless I focus and force myself to spin faster.