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Average power higher than Normalized Power on steady rides

Former Member over 4 years ago

on almost every steady ride (like steady zone 2, 170W for an hour), my average power is higher than my Normalized Power. How can that be? On my morning ride, avg pwr was 175 and NP was 170 with Intensity Factor of 0.806 (lower than 1). My setup is Garmin Vector 2S and head unit Edge 520. Thanks!

Top Replies

aweatherall over 4 years ago in reply to Former Member +1

The NP calculation includes zero power values in the calculation. If you exclude them from the average power calculation then you are inflating your average power reading every time you coast.

All Replies

0 aweatherall over 4 years ago

Is your Edge configured to excluded zero power readings from the average power calculation? The setting is under recording options.

0 Former Member over 4 years ago in reply to aweatherall

I think it is. I'll change it and see if it changes anything.

would you be able to explain the rationale behind this? why this configuration mess up the average and normalized power?

Thanks!

0 aweatherall over 4 years ago in reply to Former Member

The NP calculation includes zero power values in the calculation. If you exclude them from the average power calculation then you are inflating your average power reading every time you coast.

0 Former Member over 4 years ago in reply to aweatherall

aweatherall Thanks a lot for the explanation, make sense.

BTW - I've searched quite a lot on the net for this issue and this is the first time someone mentions that with a proper explanation. I'll report back if this actually solved the issue.

Thanks again!

0 aweatherall over 4 years ago in reply to Former Member

Let me know how you get on. If you post an existing FIT activity file where you encountered this I can take a look at the data.