Request the full data through the page https://www.garmin.com/en-US/account/datamanagement/exportdata/
Or you can use a script for exproting activities in bulk:Is there a way to export bulk data to TCX or GPX files
Thanks for the link to request full data. But I'd rather do this myself and not bother Garmin support team every few months. The Activities view has some nice filters to select the activities of interest..
Unfortunately, "Export CSV" only gives the summary data.
I want to bulk download / export the second by second data for each of those activities for offline report processing. CSV format would be ideal for making analysis plots in Excel.
While it's nice there are some workarounds with external tools, https://forums.garmin.com/apps-software/mobile-apps-web/f/garmin-connect-web/166824/is-there-a-way-to-export-bulk-data-to-tcx-or-gpx-files-seems-like-i-can-only-bulk-export-to-csv-and-individual-activities-to-gpx
Garmin it would be great if we could export activity details direct from Garmin Connect!
The script suggested by Limak74 at Is there a way to export bulk data to TCX or GPX files? Seems like I can only bulk export to .csv and individual activities to GPX. is pretty easy to use, yes, it also works in Firefox, and runs pretty quickly. But that exports all of the activities.
For exporting a filtered selection of activities the script posted by BunBun! at Show all routes on the same map can easily be adapted. I posted a short explanation how to filter activity downloads at the end of the thread Is there a way to export bulk data to TCX or GPX files? Seems like I can only bulk export to .csv and individual activities to GPX
BTW, tcx format appears to be XML format, which Excel seems to happily open into tabular format same as it would open .csv data.