Yesterday I did an open water swim, Garmin records it as taking 55 min 5 sec but after upload to intervals.icu it shows as 22 min 53 sec, please see screenshot. Distance is the same for both, the issue appears to be the activity duration. [image]

Summary shows moving time (or total time in case of Ignore velocity) Timeline shows elapsed time - you can hide pauses but timeline time displays as total elapsed. On the top left of the chart area, the cursor position is shown as elapsed and time of day. It’s been like that for a while now, so l…

I enabled ignore velocity and updated the activities, went back to the swim and reprocessed the original file, no change. My Garmin watch recorded it correctly and it was correctly uploaded to Garmin Connect, something must have happened in the sync to intervals.icu. I also tried exporting the .fit …

The timeline time corresponds to Garmin looking at your screenshots. Ignore velocity works for Indoor rides where you forgot to turn off GPS (just tested this to make sure and moving time immediately adapts to elapsed time without reanalyzing or reprocessing). So I guess that something isn’t acting…

Adding an example from August 2025 for comparison/reference. [image]

What immediately catches attention is the difference in how the pace-stream looks.

I uploaded the exported (from Garmin) .fit file into a fit file viewer. The individual records (117) show the start and end time of the activity which matches the ~55 minutes duration. I would interpret this as the fit file as all the correct data, but there’s an issue occurring when it’s ingested b…

But why does your pace stream looks so flat (and probably wrong)? I think this is the error because it‘s calculating the wrong moving time. Though I have no idea, why the pace stream could be so wrong, if you didn‘t „fixed“ it or something like this.

I’m sorry, but I’m not understanding what you’re seeing in the pace stream as being wrong. The pace shows me swimming at a consistent pace of + or - 2 minutes/100m which is what I’d expect for myself for an open water swim in 15 degree C water :slight_smile: I compared the pace stream between Garmi…

Mismatch between Garmin and Intervals.icu

Bug Reports

R2Tom 28 July 2026 18:05 23

See there, not solved yet