Unusually high MHR

Old Tuggo

I check my MHR in the recommended way one or twice per season and it is 172 approx. Although I do not race according to my HRM I refer to it frequently in TT's. I usually ride 159-163 BPM for a 10 TT and 157-161 for a 25 TT. However in an evening 10 on a very warm night my BPM was 167-170 with 171 MHR and it did not feel too hard but I was reluctant to push it harder. In a subsequent TT in more normal temperatures my BPM was at its usual levels. Does this indicate that my MHR is really much higher than my previous estimate?

Alex_Simmons/RST

It indicates that you shouldn't worry about your heart rate when riding TTs.