Below are instructions for the current workaround to get your Garmin Dakota 20 data on Strava, including HR data.
- Go to connect.garmin.com and choose to manually import the GPX. It will be the file on the Garmin called current.gpx.
- Once you've imported the file to Connect, export it as a TCX file rather than a GPX file, and save to a location on your computer.
- On Strava's website, import the TCX file.
Because the file format imported to Strava is TCX, your HR data will be included.