[COROS Dura] Power Balance chart when the Left/Right data are available

[Vissale_NEANG]

Hello,

I use Favero Assioma Duo power meters and saw that when I use them with Training Peaks Virtual there is a cool “Power Balance” heatmap chart in the power section of the intervals.icu activity :

This is really useful and helped me adjust my balance.

But it seems that when I use them with my COROS Dura there is no “Power Balance” chart, although Left/Right power balance data are available in the COROS activity (indoor or outdoor) :

@david I don’t know if it’s a bug, a feature request, or if the COROS .fit file doesn’t have the appropriate data.

Thx

[Ben]

Are you using the same sync process for coros as you were for assioma? i.e. not via strava.

And I’d check fitfileviewer to see if you can see it there, might require a custom stream if it’s not to a standard one.

[Vissale_NEANG]

My intervals.icu account is linked both to Coros and Strava and in my activity I have the tags “~ Coros ~ Strava”. But it seems the fit file used by intervals is the one from Coros.

I have downloaded the “Original Fit File” from the “Data” panel of the activity and I can see the balance data (the column “stance time balance”) with fitfileviewer.com :

The activity from “Training Peaks Virtual” has the balance data but from a different field “left right balance” :

Maybe the problem is just from the different field names ?

[Ben]

The simplest way to get this then is adding a custom stream.

Custom activity streams

Intervals.icu now supports custom activity streams for extracting data from record messages in fit files. Click “Charts” under the activity timeline chart and then “Custom Streams”. [Screenshot 2023-07-19 at 21.16.30] [Screenshot 2023-07-19 at 21.17.04] Click “Add Stream” to create a new stream or search for streams created and shared by other athletes. Note that these streams are per athlete. You can add your own streams to athletes you coach using the search button. [Screenshot 2023-07-…

You can then rebuild the charts using that.

Otherwise it’s a feature request to add that fit file name to the existing balance stream.

[Vissale_NEANG]

Thanks! It works

Needed some time to have the same “look and feel” as the original one, but it’s enough for me

[david]

Unfortunately the existing left_right_balance stream stores the value as an integer. It seems stance_time_balance is a percentage with decimals geared towards running so I can’t just always map that to left_right_balance:

https://support.coros.com/hc/en-us/articles/360040531051-Advanced-Running-Metrics#:~:text=Left/Right%20Balance:%20L/,weight%20and%20causing%20an%20imbalance.

I might do that only for cycling activities.

[Vissale_NEANG]

Ok I see

I saw that in the activity settings we can choose the power stream for the “Power Field”

If you can’t just always map to left_right_balance maybe we could have a new option “Power Balance Field” where we can select a specific stream for cycling ?