4DP test analyzed in Xert

[Heretic]

On another thread , I read that some people use use their bicycle computer to calculate their normalized power during a lap that corresponds to either the MAP or the FF section. That helps them with their pacing.

Incidentally, I modeled my last FF before I did it to estimate my output. Here is the model I used:

Sufferlandrians using Xert to track fitness?

There are two parts to the model. The first part is fixed and only has to be done once, the second requires adjustments because your fitness signature changes over time. Fixed Part: Create as many intervals as there are in FF. Each interval is a no-repeat, no rest interval. The length of each interval is the same as in FF. For the two NM intervals I set the power to 100% Peak Power (PP) For the two AC intervals I set the power to the limit of reserve power - 0% Reserve MPA. I initialize all t…

Here is where I discuss my results:

Sufferlandrians using Xert to track fitness?

I did FF yesterday using my pacing plan based on my Xert model with mixed results. The plan worked well enough for the NM/MAP part of the test reaching MPA = Power at the end of the MAP segment. I was almost at MPA when the MAP segment started. The NM estimate was pretty close, the MAP was overestimated. The FTP pacing did not work out. There seems to be a relationship between MAP and 20 minute/FTP power that Xert does not capture. I was exhausted after the FTP segment, but the power level was…

With the model and a head unit I imagine you could come pretty close. I am going to try that for my next FF.

There is also a general discussion about Xert and Suf in that thread that might interest you.