If you for some reason don't want your Garmin device to record R-R interval data anymore you can set it off the same way it was set on. You can find the settings file from the attached ZIP folder. 

Follow these instruction to set off the R-R interval recording

  1. Connect your Garmin device to the computer with your USB cable
  2. Download and save the attached ZIP file, and extract the file.
  3. Save the R-R setting file to your Garmin devices NEWFILES folder
  4. Disconnect the device.

Your Garmin device no longer saves the R-R interval data and the measurements can no longer be uploaded to Firstbeat programs. If you want to turn back on the recording you can find instruction for that here.

Note! For newer Garmin devices, such as Fenix 5/5S, Forerunner 645 or Edge 1030, you can simply turn off the "Log HRV" setting straight from the watch.