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How can I update the power zone in an already updated activity?

Former Member
Former Member

I just synced my Garmin forerunner to the Garmin connect platform and looks like the power zones are completely wrong. Z2 is starting in more than 13000, which made my entire activity be in the Z0 power zone.

I would like to know if I can update this information. I already fixed it in the device option and looks like further activities are gonna be fine, but this one I'm not sure how to fix.

Appreciate if someone can give me any advice on how to fix it

  • Verify whether the HR zones are now correct in GC Web, then export the concerned Activity as "Original", delete it, and the reimport back. If it does not help, repeat the same procedure with the TCX file format instead.