"mtbgreg1" wrote
HR levels mean very little on the MTB. If you try to go by road bike standards, good riders will blast way past redline on climbs and drop way down at other points. Tons of spikes and drop offs on the MTB.
Not sure what redline means for the heart. At my age, it goes up to a certain rate, and no further. 😆
But yes, my HR (built into my Edge 305), speed and cadence all jump all over the map on the MTB. Nonetheless, I like to take a look after and see how much time I spent in each of the HR "zones", and laugh at the "calories burned" calculation while I pop open a Troegenator.