Polar running index is correlated to VO2max based on Polar research.
It will be very beneficial for all runners using Polar or other brand watches if the running index can be calculated locally based on the equations in this link:
Running Index: New feature? · Issue #704 · thomaschampagne/elevate · GitHub ,
with the user option to add it to the running activity plot.
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I second this request, this data is interesting to understand my running training progress (I don’t have a power meter)
Alternatively, I have this data using the Running Index datafield from Garmin connect and it is outputed in the .fit file generated by my activities. If the intervals.icu is able to decide this data is good enough for me