Intensity seems too high for activities without power

1

All my commute rides are above 80% intensity.

Find below an example recorded with device Garmin Fenix 6:

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image1622Ă—749 90 KB

Description says:
For activities without power intensity is derived from the training load and duration

And training load is based on HR and GAP.

Find below my HR settings:

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Can you help me understand how intensity is calculated without power ?

Thanks

2

How much data do you have from activities with both Power and HR?
What happens is that Intervals builds a model derived from activities with both Power and HR and then uses that model to guestimate what the load is when only HR is available.
This works really well if the model has been given enough data. But it might be off if you only have a couple activities with both power and HR.
You can check the models outcome on some of your activities with both to see how well they much on the activity HR page;

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3

Thank you for your reply.

I believe I have enough activities with power and HR.

Here an example of a Zwift Z2 50’ ride with 68% intensity (which seems correct from my perspective):

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image1625Ă—926 113 KB

4

Can you show a similar screenshot from one of your commutes? The reason I’m asking, is that HR on your commute, at least the one above, is significantly lower. And maybe the model doesn’t have data for the lower HR region?
In the Zwift screenshot above, you can clearly see that the model is working well for HR that is a bit higher. 42 versus 40 is a very good estimation.
And also click on the pencil icon next to the Load metric in the summary, to make sure that load is derived from HR. It almost certainly is, but just to be 100% sure. Example from one of my runs:

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If you can’t figure out where things go wrong with the above, david may need to take a look because there definitely is something wrong.

5

Training load on the commute ride:
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Activity HR of cummute ride:

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6

@david Would you have time to have a closer look ?

Many thanks

7

Finally figured out the reason:

I had my HR Training Load set to “Time in HR Zones”. Looks like this model is not working well for low intensity rides.
I have changed to HRSS and now my training load for commutes is between 5 to 15 which seems appropriate.

1 Like
8

Thanks, this solved a problem I was having.

1 Like