I looked at Chad’s spreadsheet which gives a good picture of the zones using power and heart rate. I did Carson this morning which is a sweetspot workout with six intervals in the sweetspot area.
Now sweetspot is 88-95% of FTP (power) and 90-95% of lactic threshold. (heart rate) and I was very interested to see the correlation between power and heart rate zones as I’d imagined my heart rates were always higher than they should be but as it turned out my heart rate and power zones in this workout were where they should be.
In all intervals my heart rate was between 86-92 of lactate threshold slightly lower than where they should be.
I realize there are a lot more variables with heart rate eg heat, sleep stress but…
Do most others here who are using heart rate find their zones are where they should be in relation to the power zones when all things are equal?