Subject: Feedback on Zone Sense accuracy: Short intervals and Zone 2 threshold shifts
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@sky-runner There is something strange here. I rarely get an LT threshold from ZS, only when I am doing Tempo (at my LT) intervals or running intervals (above my LT). I do not get LT thresholds with typical Endurance runs done mostly in Zone2 with some Zone3.
As I have stated before my AT threshold will differ by a lot, when fresh it equals my lab-based number, done when I was well rested but when training hard my AT can be near the bottom of Z2 for me, which makes total sense as I am fatigued.
Again, I don’t think ZS should be used to set your zones unless you have a lot of data. I do not change my zones based on ZS predictions but I find ZS helpful in real time as:- Keep me from going to hard early in a long run/race as I feel good.
- To go harder on long training runs when I might slow down as I am getting tired.
To conclude, there is something wrong with your data, using ZS for a long time I have never seen what you show here. I do not know what HR belt you are using. Moreover, I don’t think that the discussion on ZS should be primarily on where zones are predicted.
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@sartoric How do you do ?
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A simple copy-paste? Seriously? That’s it
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In the areas where Zone Sense marks the curve in red (anaerobic), I was clearly in zone 3. I could count or recite the alphabet without any trouble, yet the watch showed me at the absolute limit of the red zone.
