Steps to Manually Upload Activity Data From Your Outdoor Handheld to Your Garmin Connect Account | Garmin Customer Support
GitHub - xonel/Garmin-Forerunner-610-Extractor: Extracts FIT files from ANT-FS based sport watches such as Garmin Forerunner 60, 405CX, 310XT, 610 and 910XT.
Garmin Forerunner 610 GPS Heart Rate Monitor | REI Co-op