I was looking at my ride from Saturday and I noticed a rather significant difference in the Wahoo, Strava and TrainerRoad KJ calculations. I would think KJs are a rather absolute measurement, unlike something like IF or TSS, so disappointed to see a 24% difference between headunit and TR. Any expl…

Only single digits/ .3% between Strava/ Bolt/ TR for me from my spin on Saturday. kj = kcalories is what TR use. Strava and TR pretty much matching, so I’d suggest it’s the Wahoo that’s off? What was the head unit showing at the end of the ride? fwiw, I seem to be having lots of updates to my bolt…

Mine vary too, but not enough to be worried about. [image] [image] [image]

Anyway you can look at the raw data? Golden Cheetah or WKO? Strava and TR might be reporting based on correcting the gaps in recording. It’s an odd behavior because when I upload my RGT Cycling ride file (raw), they don’t correct for the gaps. Looks like Wahoo is uploading extrapolated/massaged data…

All apps/computers calculate slightly different for a variety of reasons. If you are following numbers pick one and ignore the rest. Lol, I pick garmin, for me its always 0.1-.0.2mph faster and 1w higher and its the one thing I’ve always got with me indoors or out :wink:

It’s over 19% difference in first example and 20% the second.

It always is, different app/computers collect slightly different base figures based on autopause and tons of other variables, they then process it with other factors which magnifies their differences in guesstimates of Calories etc. Don’t get hung up about it, its just the way it is, just pick one …

Wahoo looks off to me. It looks like you stopped for an hour, or so, so looking at moving time, looks like about 4 hours 10 min. so time in seconds is 4 * 3600 + 10* 60 = 15000 seconds, times 194 average watts is 2,910,000 J, or 2910kJ, which is much closer to TR and Strava.

KJ with a power meter should be very consistent, its just average watts x time in seconds.

Should be, but from time to time things will be different but your original power averages are different so it won’t be. Maybe its the method of recording (recording 0s) or autopause settings or simply gps interference. Don’t get to hung up about just use one thing and follow it. Night :+1:

Thanks for looking at it and the calcs. That’s correct on stoppage time, I got colder than I think I’ve been on some early ride descents and it took me about 45min and 2+ cups of coffee to stop shaking!

KJ Calculations on Various Platforms

Training

SaSha1103 March 9, 2021, 6:54am 16

I have the same issue with Garmin and my Stages XT pm. Garmin AVG Power - Equipment - TrainerRoad

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KJ Calculations on Various Platforms

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