Time Shifting activities in GC 3.7 SP1

[Haydn Foster]

I'm looking for a way to time shift an activity by a few seconds.  I'm trying to compare 2 activities in the Ride Chart and wish to move 1 of them to synchronise  it exactly with the other on the time scale.  The 2 activities are actually one ride event recorded simultaneously on 2 different devices, each producing a FIT file.  Because the 2 devices did not start recording at exactly the same time, their FIT files are slightly time shifted.  I am trying to overlay the Heart Rate curves (recorded from 2 different HR monitors) for accuracy comparison.

Does anyone know if there's a way to do this?

[Ale Martinez]

El viernes, 9 de enero de 2026 a la(s) 10:29:46 p.m. UTC-3, haydn.f...@gmail.com escribió:

I'm looking for a way to time shift an activity by a few seconds.  I'm trying to compare 2 activities in the Ride Chart and wish to move 1 of them to synchronise  it exactly with the other on the time scale.  The 2 activities are actually one ride event recorded simultaneously on 2 different devices, each producing a FIT file.  Because the 2 devices did not start recording at exactly the same time, their FIT files are slightly time shifted.  I am trying to overlay the Heart Rate curves (recorded from 2 different HR monitors) for accuracy comparison.

Does anyone know if there's a way to do this?

You can create an interval on the ride you want to shift (or both if necessary) then compare the interval(s). If for any reason you want to remove the excess you can use Activity > Split using the interval as boundary.

[Haydn Foster]

Thanks.  This works well.