Synchronize activities made before watch

Are you wanting to see the previously recorded activities on the watch itself? 

This is technically possibly if you exported all of these .FIT files and loaded them onto the watch manually, but this isn't the intended design. The Forerunner is meant to record activities while Garmin Connect wills tore and display them. 

Yes, I thought it will help the watch to understand my profile and my statistics, before my first activity with the watch itself.

I still have all my previous activities on garmin connect, but not on the watch.

Enabling Physio True Up (through Garmin Connect) should get your previous statistics (if not the activities themselves) onto your new watch.

TrueUp syncs the summaries (not the maps) of activities to the watch, so you'll see them in the history on the watch. Also the totals per month and week (going back a couple of months) will be sync'ed.

Thank you for your answer, but the link doesn't work

Thank you, after enabling Physio TrueUp and synchronising, the previous activities still doesnt appear on the watch, neither the activities calendar, only the activity I made with the watch

As mentioned In 's response, Physio True Up won't pull in prior activities. It will however pull in your Training Load, VO2Max, etc that were generated by those prior activities.

My apologies for the broken link. Philip beat me to it, but I still edited my original post. 

Please let me know if I can help clarify what will/will not be pulled into your device with Trueup. Activities will not be added but many other training metrics will be.