Power zones settings with Polar

I’m back to my Polar Vantage V2 watch for a while, because I like its look and lightness, plus I appreciate a lot the sleep analysis. I also use Stryd footpod during my runs, I started using Stryd in 2017 for distance and pace accuracy, but also appreciate the running power and Polar plays nice with Stryd. I must admit, since I’m not living (and running) in a hilly area, I could live with pace based training .. but running power is a very good option for me as a data geek.

Anyway … the reason for this post is that in the last 10 days I run three times in an awkward situation, when the structured workout based on power was unusable because Polar stubbornly was reverting the MAP value (https://support.polar.com/en/running-power) to the Polar running power value, overwriting the value I captured manually from Stryd.

Regardless of my CP value, Polar was reverting that to the 496W value (based on the Polar MAP value)

When using the default power zones, any change for the MAP (Critical Power) is also changing the zones, therefore the running in Zone 1-2 in the structured workout become impossible, since the values were way too high.

Sure, that’s fixable .. it takes just some minutes to change the MAP value again and sync your watch with Flow mobile, but the first time it also takes some time to debug and that’s not always funny with it’s -5 degrees Celsius.

Now, I changed the power zones to custom – that will require some more work when the MAP/CP values changes .. but at least I hope that I won’t be needing to stop my workout to reset the MAP and sync the watch after a false start of the workout.

I tried to understand what’s causing this issue…some days was just working fine and then suddenly I saw the change again when starting the workout – I still don’t have a clear pattern, the only thing that I’ve done is adding some new sensor (like an Polar H10 or Verity Sense) since the previous session…I don’t understand how that would affect the definition of the running sport profile for Vantage V2, but who knows..

So, just in case you experience the same issue, change the power zone type to custom to avoid this annoying start of your power based workout.

Lately, I become more aware that it’s only a significant minority of users who are interested in running power, even less interested by structured workouts and combining that with the profile of the Polar users, you’ll find a even smaller audience – anyway, I hope my experiences will help you to avoid some awkward moments in your training.

Stay well and enjoy running!

Author: Liviu Nastasa

Passionate about software development, sociology, running...definitely a geek.

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