http://home.trainingpeaks.com/articles/cycling/the-science-of-the-performance-manager.aspxYojimbo_ said:Just to continue this in a slightly different vein......
Anyone know why it's to the 4th power and not something else? I'm curious as to the basis for this.
No. Brain fade on my part.frenchyge said:Is the 4th order discussion in there?
There is no formula, funky or otherwise, to convert AP to NP. You have to independently find NP based on the power data from the ride, using the steps I posted above. For some rides, NP will equal AP, and on other rides it will be higher or even much higher. There's a spreadsheet in the files section of the Wattage Google group that will calculate it for you if that's what you need.giannip said:Thanks everyone. I was loking for the ACTUAL formula. As in all the funky mathematical stuff
Just came to my mind from this question something that I have been thinking recently:frenchyge said:There is no formula, funky or otherwise, to convert AP to NP. You have to independently find NP based on the power data from the ride, using the steps I posted above. For some rides, NP will equal AP, and on other rides it will be higher or even much higher. There's a spreadsheet in the files section of the Wattage Google group that will calculate it for you if that's what you need.
so there IS a formula how else would CP calculate NP for a ride ?frenchyge said:There is no formula, funky or otherwise, to convert AP to NP. You have to independently find NP based on the power data from the ride, using the steps I posted above. For some rides, NP will equal AP, and on other rides it will be higher or even much higher. There's a spreadsheet in the files section of the Wattage Google group that will calculate it for you if that's what you need.
thanksfrenchyge said:I'm sure there are nicer ones out there, but this is the one I use. NP and TSS values are approximate since smoothing is neglected.
Well there's definitely an algorithm or a defined sequence of steps and they're exactly what frenchyge posted above. It's a bit harder to express that algorithm which operates on a list of data values as a closed form expression. It can be done with time indexed summations but it won't look like high school algebra because of that nasty 30 second averaging window.giannip said:so there IS a formula how else would CP calculate NP for a ride ?...
I'm beginning to wonder...giannip said:or am I being daft again
Thanks. That's pretty much like what I use. I was just wondering if the smoothing could be applied somehow in a formula.frenchyge said:I'm sure there are nicer ones out there, but this is the one I use. NP and TSS values are approximate since smoothing is neglected.
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