2 weeks ago I did Norway for the first time at 100%. Before that I had almost 2 full months off from training. I had only been back to scheduled training for a couple of weeks and my fitness level was pretty poor. My LTHR usually tests between 156-159. Once the video really got going my heart rate never came back down below 145. Even early on my HR was almost entirely above 129bpm - even for the recovery sections - and then it peaked at 175 bpm. I averaged 151 bpm for the whole workout! That’s VERY high for me.
Today - 2 weeks later - and after 4 days of hard TOS stages (i’m doing GMTI, but I did do both versions of Fight Club for stage 3), my HR situation couldn’t really have been more different. Yes, I did it today at 90% instead of 100%. But my normalized power from today was actually higher than it was when I first did it at 100% (I’m using the same 4DP numbers). Today, my HR rarely ever went above 140. The differences between the peaks and troughs were more pronounced. And my average HR was 127 bpm with a peak of only 161.
I dare say it’s a sign that I’m riding myself back into shape.
Will be interesting to do Norway again next month at 100% again after finishing the Tour and getting some recovery. Then I can compare fresh numbers to fresh numbers.