Lap average power

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1

Todays ride was to do 3x15 threshold intervals followed by 3 ad-hoc intervals but I am wondering why the average power for the interval differs so much from my computer and strava?
So, for each interval I hit the lap button and then again at 15 mins exactly give or take 1 second.
My Wahoo Bolt V2 recorded avg power for the three laps as follows:

  1. Time 15:00 Power 309w
  2. Time 15:01 Power 308w
  3. Time 15:00 Power 309w
  4. Time 4:09 Power 328w
  5. Time 2:47 Power 354w
  6. Time 8:49 Power 314w

However on interval data it gave the following:

  1. 15:00 299w
  2. 15:01 297w
  3. 15:23 298w
  4. 4:09 302w
  5. 2:47 283w
  6. 8:49 293w

So apart from interval 3 where intervals.icu finds another 23 seconds from somewhere the times are exactly the same but the power levels are way out.
Why is this and what do I need to do to align them?

2

given your desc, i think your best bet is to provide a link to your data so that @david can take a look (I can’t, since your activities are private by default)

I was looking at my own ride this morning.
Garmin → Strava → intervals

For Intervals. I am using “Actions → Use Laps → Analyse → Keep All Laps”. The Garmin is configured to auto-lap at 10km. Data from intervals is not consistent w/ the expected data.

Screenshot 2022-02-09 at 9.43.21 AM
Screenshot 2022-02-09 at 9.43.21 AM1332Ă—580 58.3 KB

Laps as seen from Strava

Screenshot 2022-02-09 at 9.37.49 AM
Screenshot 2022-02-09 at 9.37.49 AM2148Ă—378 38.5 KB

3

Thanks for the reply your laps seem even further off than mine, I am also using Actions>Use Laps
Not sure how to link to data unless its a link to the ride HERE
and the lap data HERE

4

So… i got curious…
I downloaded the original FIT file from Garmin Connect and manually uploaded it into intervals.
It worked well.

maybe strava is the link? how are you uploading your data in intervals?

Screenshot 2022-02-09 at 6.47.49 PM
Screenshot 2022-02-09 at 6.47.49 PM1588Ă—664 70.2 KB

5

All my data is uploaded to strava and then presumably automatically uploaded to intervals.icu, though the Strava intervals are correct

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6

Do you have a privacy zone configured on Strava? If you do then it sometimes mangles the lap data. This is a long outstanding Strava bug.

I used the auto detection and did a little manual editing and the intervals are close now.

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7

Hi David
I have a privacy zone but nowhere near where the laps I was concerned with if that makes any difference?

8

No it seems just having one messes up the laps. I think Strava gives me all the data (including privacy zone) but “adjusted for privacy zone” lap data which doesn’t match.

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9

hmmm, I would feel a bit naked without one though, is there a workaround I can do myself, I use a Wahoo Bolt v2

10

You could manually upload the .fit file or maybe configure Dropbox integration? Not sure how much support Wahoo has for Dropbox. Either way the file will replace the Strava activity and the laps should be good.

11

OK, I’ll see what I can manage, thanks again

12

I managed to find the .fit file on the device and drag that in to replace the strava file, all seems good with that, thanks for the help with this.

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