Hey!
I think this should be really easy to implement. I’d love to have the option of using Work (kJ) instead of Load as the metric ón which the Fitness / PMC chart is based on.
I’ve already created a simple custom chart myself (with the respective exponentially weighted moving averages of daily Work), but it would be nice if the option was built-in and the chart would look like the current Fitness chart in the sense of also showing notes, races, achievements etc.
Thanks!
Anna
The PMC chart based on Work would display something completely different, so I don’t understand what you want this for.
Load is referenced to an anchor point ‘FTP’. Work has no anchor point. If you get fitter, do the same amount of hours at a higher velocity, work will keep increasing. Load on the other hand, will not increase if intensity referenced to FTP is similar.
I can understand that you would want to plot Work and the PMC chart side by side. That will show that a steady Fitness doesn’t mean that Work is also steady. But the 42d and 7d weighted moving averages of Load would mean nothing if you use them on Work.
That’s what I see at this moment, but if you can explain what you want to achieve with it, it might help understand.
Hey! Sorry for not having made myself clear.
Basically I want to avoid using TSS (“Load”) to estimate my training load. I’d rather use kJ or some derived metric. I understand that this is not perfect - the perfect metric to capture training load probably doesn’t exist - but I just don’t like the arbitrariness of the TSS formula.
I stopped looking at TSS for my daily rides a while ago and just look at kJ and perceived fatigue, so having a PMC based on a metric that I don’t “believe” in doesn’t make much sense for me.
As you point out, one downside of kJ is that it doesn’t take into account your fitness (although changes in my case will be minor), so yes, it might be somewhat more valid if we divide it by some anchor point like FTP or LT1.
Could you expand on that? Coggan’s reasoning for some of the various values like NP, IF and TSS and how they hang together do make sense if you view it from the angle of trying to prevent overtraining Normalized Power, Intensity Factor and Training Stress Score | TrainingPeaks Which is to say that TSS by itself is not the only thing that matters.
