I have several manual activities (a couple hundred) that I have added into Training Center over the years, such as treadmill runs, however those runs did not import into Garmin Connect, and they cannot export successfully. I see that you can manually add activities one at a time, but that will take forever. Is there any way to export these manual activities, or to put them into one file so they can be uploaded all at once, instead of one at a time?
Only the activities at MotionBased will migrate to Garmin Connect. Training Center is not connected to the Internet so there is no way to transfer those activities, save for uploading them to Garmin Connect.
You will need to add the non-GPS activities one by one at Garmin Connect. There is little data in the files at Training Center so it is likely that most (all) will fail to upload to Garmin Connect.
