Decoupling question

Have you changed the formula for calculating decoupling? Asking because I’ve noticed my decoupling value increasing since about October 2021. I’ve looked back at my training and cannot find a reasonable explanation for this. Also since I use TrainingPeaks as well, I checked the TP data and I noticed that TP seems to calculate my decoupling as lower than Intervals, case in point, a ride I did today Intervals has decoupling as 6.8% but TP has it at 1.9%. Any insights would be much appreciated. Thank you. Wayne

I haven’t changed that. Its this activity right? Intervals.icu

I see you do have a big power and HR drop out in the first half. Maybe that has skewed things? Do you mind checking another activity against TrainingPeaks. Tx.

Hi David,
Thanks for the quick response. That big power drop was a bathroom break :slight_smile: That is the correct activity. The other good comparison is the same course but 70km on 12/5/21 also has a bathroom break about 50 minutes in, that ride TP has the decoupling as 9.22% and Intervals has it at 13%. The rides are done on Rouvy, which sends directly to TP, but first sends to Strava and then on to Intervals, I wonder if something is happening in that pass through via Strava?

I had a look and I think Intervals.icu is correct. I had forgotten how this works. Intervals.icu won’t have a problem with the bathroom break because it breaks the ride into 1 minute segments and excludes those with less than 60s moving time. It also adjusts for HR lag. Looking at the charts it is clear there is quite a bit of decoupling happening:

You can also click the CSV button and look at the actual minute data.

Thank you David. I’ve been puzzling over why my decoupling suddenly increased in early December, your feedback helps to know nothing changed in terms of the calculation. I’m now thinking it’s temperature related as my pain cave is a small cabin outside [in Maine] and normally when I start my sessions it can often be below freezing, I do have a heater, and by the time I’m done, it’s often up to 20 degrees C. I also use a Wahoo Kickr Snap and I’m sure temp is influencing it even though I do a 10 min warmup and spin down so very likely as the cabin warms the calibration is going to be off. Good excuse to get the Kickr v5 that auto calibrates :slight_smile: I hope 2022 will be a great year for you, stay safe.

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