.fit файл можно выкачать из Стравы (как платной так и бесплатной) и вручную загрузить в Garmin Connect:
https://support.garmin.com/en-US/?fa...k92n0OLLjwgEY8
Manually Uploading Activities to Garmin Connect
NOTE: Garmin Connect supports .FIT, .GPX, and .TCX files. For a GPX file to successfully upload to Garmin Connect, the file must include time information. If you are exporting activities from Strava with the intent of importing them to Garmin Connect, you will need to export the activities as single activities rather than a bulk export (see Strava Support - Exporting your Data and Bulk Export).
Connect the device to a computer using a USB cable if that is where the file is saved.
Sign into Garmin Connect.
Select Cloud With an Arrow in it in top right corner of page.
Select Import Data.
Select Browse.
Locate and select the activity file.
Select Import Data.
Once the activities are uploaded, they can be viewed in Garmin Connect account.
Требует некоторых усилий но ничего особенно сложного.