Apologies for double post
Have been training for some months below lab tested aet of 127 bpm. On my last two workouts my heart rate climbed to 141 bpm. At that heart rate I was completely comfortable. I could speak in complete sentences and was breathing normally. Caveat it was 100 degrees Fahrenheit with a heat index of 107. Is it possible, before I test, that my new aet is above 140 bpm or is it heat related ? Thanks for any opinions.
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