Omni model CP request

Feature Requests
1

Can we implement it on intervals? I think this could be an useful feature as this model is really good especially for women. @david if you think this can be implemented I can help with it

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2

If you send me information, I can try to create something and then when David considers it appropriate, he can implement it himself

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The original paper is here:

You can find info on the model here:

There are three forms of the model, as shown here:

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I have the model coded in Excel and use the model that’s provided in Golden Cheetah. It’s a decent model and borrows from Péronnet and Thibault (1989). It has a very similar shape to the “FTP” model provided in WKO5 and ExtendedCP model in GC, which also have the log decay after TTE.

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-------> SCRIPT for the OMNPD Model:

const W_prime = 20000; // Enter your W’ value in J
const CP = 250; // Enter your CP value in watts
const P_MAX = 400; // Enter your P_MAX value in watts
const T_star = 1800; // Threshold parameter in seconds (30 minutes)
const Lambda = 0.1; // Enter your Lambda value

const T = activity.moving_time; // Activity duration in seconds

const term1 = W_prime * (1 - Math.exp(-T * (P_MAX - CP) / W_prime)) / T;
const term2 = (T > T_star) ? Lambda * Math.log(T / T_star) : 0;

const P = term1 + CP - term2;

return P;

-------> SCRIPT for the Om3CP Model

const W_prime = 20000; // Enter your W’ value in J
const CP = 250; // Enter your CP value in watts
const P_MAX = 400; // Enter your P_MAX value in watts
const T_star = 1800; // Threshold parameter in seconds (30 minutes)
const Lambda = 0.1; // Enter your Lambda value

const T = activity.moving_time; // Activity duration in seconds

const term1 = W_prime / (T + W_prime / (P_MAX - CP));
const term2 = (T > T_star) ? Lambda * Math.log(T / T_star) : 0;

const P = term1 + CP - term2;

return P;

-------> SCRIPT for the OmExp Model

const W_prime = 20000; // Enter your W’ value in J
const CP = 250; // Enter your CP value in watts
const P_MAX = 400; // Enter your P_MAX value in watts
const T_star = 1800; // Threshold parameter in seconds (30 minutes)
const Lambda = 0.1; // Enter your Lambda value

const T = activity.moving_time; // Activity duration in seconds

const term1 = (P_MAX - CP) * Math.exp(-T * (P_MAX - CP) / (Math.E * W_prime));
const term2 = (T > T_star) ? Lambda * Math.log(T / T_star) : 0;

const P = term1 + CP - term2;

return P;

This are the scripts I think this could be good. I’m triyng to implement it on intervals now

5

can you please share how did you put it in excel?

6

You can use the spreadsheet I just shared if you want to try the model.

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7

many thanks!

8

Thank you.