Threshold Heart Zones


#1

When I started TR, Garmin had estimated my threshold heart rate to be 162 bpm. I thought this was pretty accurate because when I reached that level, I had nothing left. After a year of training, I can “easily” sustain 166 bpm and don’t feel like I am destroying myself until 175 bpm. Did I truly increase my Threshold Heart rate by 13 bpm through training, increased my ability to suffer more and endure higher heart rates, or a blend of the 2?


#2

No you didn’t. In my experience Garmins estimates are way off. Ones heart rate zones don’t really change, that is physiologically you, the power you can put out at a certain range can increase and does increase as you get fit. In your case I would say the estimate was way off.