Correcting TSS, no more beer and burritos for you !

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Mark Liversedge

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Feb 17, 2016, 4:15:51 PM2/17/16
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Hi Guys,

If you have v4 dev build you can add custom user metrics. A little bird just donated a formulation to fix TSS to be additive, it means TSS is not inflated when freewheeling. It makes a remarkable difference for my road rides. 

Also, I have a metric to capture Freewheeling time too. Its quite amazing how much time you spend freewheeling, especially on group rides and hilly rides, 25% isn't unusual for these (!).

Anyway, here are the codes to try... 

CORRECTED TSS *


FREEWHEELING TIME *


And the LTS/CTL using this cTSS metric is now seriously adjusted for me, but not so much for trainer rides, which is REALLY interesting, since they have less freewheeling. RPE now looks much closer to TSS too.

Be interested in your experiences (but you need v4 development build).



CHEERS

Mark

* I didn't fix the comments in that code did I ? (wraps own knuckles).

Mark Liversedge

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Feb 17, 2016, 4:25:49 PM2/17/16
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And here is a chart of difference between cTSS and TSS, with the freewheeling time.



Mark

Mark Liversedge

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Feb 18, 2016, 5:28:15 AM2/18/16
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LOL, I borked the implementation and await the dawn in the US to get a clarification on my error.
Will post an update.

Slightly embarassed !

Mark

Rafael Oliveira Ribeiro

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Feb 18, 2016, 12:28:41 PM2/18/16
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Mark, it seems interesting, esp. the freewheeling time metric, but I wonder if the original TSS will be kept. I hope it will!

Also, it's not clear to me that it's best to have cTSS as additive. It's just a feeling about how hard it is to produce the same power later on, when one's really fatigued.

Regarding not considering the time one spends freewheeling on the training load metric, I see that freewheeling provides some recovery that subsequently allows for more power to be aplied, so it's also my guessing it should not be discarded. Discarding it seems to me as an equivalent to enable the option on the garmins to not record zero power.

Despite all that, your CTL/LTL seems to be just scaled down when using cTSS, but the curves are quite correlated, which is to say that maybe there's not much insight to be gained using cTSS intead of original TSS.

Rafael


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Alex Harsanyi

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Feb 18, 2016, 5:21:40 PM2/18/16
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The way it is defined in the screenshot, cTSS is simply TSS * 0.67, so it is not a surprise that they are correlated.  I believe there is a mistake in the formula for cTSS, maybe fDuration should be used instead of Duration in cTSS?

Best Regards,
Alex.
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Mark Liversedge

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Feb 18, 2016, 5:28:26 PM2/18/16
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Yeah I misread the formula. I got a clarification this afternoon and will post an update tomorrow.
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