I don’t remember if you told me this but do you plan on doing yearly periods of low HR? It seems like people can plateau with low HR and taking a break and coming back to it… It’s almost the inverse of thinking about traditional periodization. Your base period is where you increase and your build and peak are were you fine tune. I have done many periods of low HR but I am on/off inconsistent so the patterns are not so clear.
Low HR workouts are definitely here to stay in some for another for me, that’s for sure.
For now, I will carry on until I see a plateau in power at 126bpm and decide what to do at that point.
I am still toying with the idea of returning (after a long, long time) to time trials. That would influence the nature of my training to some extent.
Yes, if I remember correctly Mark Allen said it took 2 years before he plateaued and then just cycled in seasonal true base periods. Oh yes I remember you said TTs, it’s interesting to me, not sure I could handle the suffering except maybe a 2-3 minute TT 
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Ivegotabike,
Where does 126 BPM come in for you power wise? Is this a middle of zone 2 power or closer to LT1 power?
Did 126 BOM come straight from the MAF formula or did you determine it some other way?
Dave
In terms of power, it varies. Whilst the underlying trend is that the average power is increasing, there is considerable day to day variability. Here are a couple of examples
The MAF formula gives 132bpm for me, so a training range of 122-132bpm.
I set 126bpm to give me a bit of headroom to try to respect the 132bpm ceiling - my HR increases when I drink, or eat, or get up out of the saddle, or any number of other things.
Looking at the data, I could probably get away with nudging it up to 127bpm, but the results at 126bpm are good enough for me for now.
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Thanks, looks great!
This type of training appears very effective to push your power duration curve to the right.
Dave
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