@WindWarrior Take it easy my friend, we are just sharing information and learning in the process. Maybe I should have been more specific with the FTP definition I used. I should have quoted it from the Training and Racing with a Power Meter book that I have read in detail (the definition is on page 27 of my copy), instead of writing it by memory.
As for CP, being relatively new to me, I read about it in several sites, including High North Performance you mention ( Critical Power and W’ Explained For Cyclists (inc. Critical Power Calculator) — High North Performance
as well as others such as:
Road Cycling Academy:
Critical Power vs FTP for Cyclists: What You Need to Know
The Threshold Coach
thethreshold.coach
Working Triathlete
Critical Power Testing: How to dial in your intensity zones
I found that the CP definition in these sites is not consistent among them, so what I wrote was my way to summarize it.
If you are aware of the official definition, I would appreciate if you can direct me to it so that I can learn more.
And no, I did not use chatgpt for any of this.
The purpose of this thread was not to discuss FTP vs CP but rather to give some basic context to show a finding I came through about comparing the W prime performance in intervals.icu with Garmin’s Stamina.
The context was needed because in the second post of this thread
forum.intervals.icu
@david explains that
“I decided to use FTP instead of CP because from what I could tell they would usually be close together and setting training zones relative to FTP is so popular.”
so, strictly speaking, he is combining the 2 methods using FTP as CP and the W prime value obtained from the power chart.
In order to properly compare Stamina to W prime in the 1040 I had to be sure that the same parameters were used to properly compare the output.
Thanks for your comments.