Coggan metrics for running and Critical Power History trends

[BrentK]

Hi,

Are the Coggan metrics supposed to work for running? I use a Stryd power meter but any of the charts which display a Coggan metric does not display anything for that curve. I assumed that they should show up since under the Athlete settings, the Run Power zones does does have a setting for "Use FTP for Coggan metrics".

Another issue I have which may well be related to the above (and how GC treats run power), on the Trends/Library/CP History chart, there should be curves for CP (Ext), Critical Power, W' (Ext) and p-Max (Ext) - the only curve I see is Critical Power. My normal CP chart under Activities shows correctly. Is there somewhere I would set the parameters for these CP calcs like in the normal CP charts?

Brent

[Ale Martinez]

El lunes, 15 de mayo de 2017, 20:26:02 (UTC-3), BrentK escribió:

Hi,

Are the Coggan metrics supposed to work for running? I use a Stryd power meter but any of the charts which display a Coggan metric does not display anything for that curve. I assumed that they should show up since under the Athlete settings, the Run Power zones does does have a setting for "Use FTP for Coggan metrics".

No, since they are designed for cycling. The setting probably should be removed to avoid confusion.

Another issue I have which may well be related to the above (and how GC treats run power), on the Trends/Library/CP History chart, there should be curves for CP (Ext), Critical Power, W' (Ext) and p-Max (Ext) - the only curve I see is Critical Power. My normal CP chart under Activities shows correctly. Is there somewhere I would set the parameters for these CP calcs like in the normal CP charts?

It is not related but, yes, power duration model estimates are currently computed for cycling only.

[BrentK]

Thanks Ale. Is there a specific reason Running Power is not treated exactly the same as Cycling Power?

[Ale Martinez]

To do so would implicate additional development to maintain both cycling and running model estimates and pmc separarated, it's possible but probably a lot of work which I am not sure it's worthy.

If you really want TSS for running it can be easily computed using a formula s.t. 100*Duration*IF^2 or a custom metric using the same formula as value and isRun<>0 as filter or relevant

[Ale Martinez]

Should be (Duration/3600) instead of Duration in the formula above

[Simon Oelmann]

Hay,

i would love, if you would be able to add those metrics for running power... To be one more guy who needs it. Would be really great to avoid paying Trainingpeaks... I want to use CTL for the intire triathlon Training... This is only possible (at least for me) with TSS numbers etc.

Simon

[Ale Martinez]

El lunes, 18 de septiembre de 2017, 11:22:48 (UTC-3), Simon Oelmann escribió:

Hay,

i would love, if you would be able to add those metrics for running power... To be one more guy who needs it. Would be really great to avoid paying Trainingpeaks... I want to use CTL for the intire triathlon Training... This is only possible (at least for me) with TSS numbers etc.

You can define a custom metric to compute a Combined TSS using running power and the published definition for sTSS using the following formula:

{

    # calculate metric value

    value { if (isSwim) 100*(Duration/3600)*(Average_Speed/config(SCV))^3; # http://home.trainingpeaks.com/blog/article/calculating-swimming-tss-score

            else if (isRun)  100*(Duration/3600)*IF^2;

            else TSS; # TSS for cycling is a builtin metric

    }

}

Here you can find a step-by-step example about how to define a custom training load metric and use it in several charts: http://forum.slowtwitch.com/forum/Slowtwitch_Forums_C1/Triathlon_Forum_F1/Slowman's_Aerobic_Points_in_GoldenCheetah_P6183696/