OPTIMAL CADENCE

PRO CADENCE is an algorithm Oc = (NP/FTP) *(Cl/1700) to determine an optimal cadence based where the variables are:
NP Normalized Power
FTP Functional Threshold Power
Cl Crank Lenght (Height in runnning)
1700 Cranck Constant

This concept is similar to an automatic gear box in cars: power is the factor of torque and revolutions, so gears make the posibility to divde torque in the best among of torque per revolutions it can handle, i mean when you have more torque demand the gearbox automatically goes to a lower gear to divide torque in more pieces, and when you have a lower torque demand the gearbox  goes to a higher gear for not burning the motor, so translated to the bike, the algorithm can calculate optimal revoutions for your optimal biomechanical body cadence.

Optimal biomechanical body cadence, is most effective way of making an effort for the human body, it can be realated for cycling, running, rowing, waking etc. and based on several articles your biomechanical optimal cadence is around 90  but this number is relative, 90 is the optimal cadence at your sweet spot FTP because your body has the optimal anaerobic and aerobic effort, lest think you have and FTP of 220 at 90 rpm your optimal cadence torque is 90/220=0.40, so  what if you go below or above and want to mantain 0.40 optimal cadence so at 240X.40=96 so but how do we know  if we are having a good day or a bad day, so maybe we can use Intensity Factor (NP/ FTP) to develop an algorithm.

For cycling the implementation si automatic on PRO versions selecting your crank height, the cranck lenght adjust the torque applied to system as longer cranks require less torque and more travel and shorter crancks require more torque and more revolutions.

For runners the optimal cadence zones are  automatic calculated on PRO versions based on your height.

In conclution the for optimal biomechanical cadence zones the torque you can sustain multilpied for revolutions.
You can see the Power Wind Pro  zones implentation on the xls table below

References:
https://www.researchgate.net/publication/49284193_Optimal_cadence_selection_during_cycling/download
https://www.applemanbicycles.com/resources/crank-length-vs-power-cadence/
https://molab.me/running-cadence-the-ultimate-guide/