Solution: When your heart-rate data contains distance information, the you can do the following:
- First import the track from your GPS device, iphone or file and make a route of it so that it appears in the routes list.
- Remove the activity as otherwise you cannot add a new activity for the same date. - Then import your workout from your ForeRunner 50 or HRM file and select the route in the import panel.
TrailRunner will now merge the Heat-rate data and the GPS Data based on the distance information.
Note: For not GPS enabled workout devices you require a food-pod while your where running as TrailRunner requires distance information for the matching.