In the watch manual Garmin says:
"You can set up your Forerunner watch to broadcast your heart rate data automatically when you begin an activity. For example, you can broadcast your heart rate data to an Edge bike computer while cycling. NOTE: Broadcasting heart rate data decreases battery life. 1 Press START. 2 Select an activity. 3 Press . 4 Select the activity settings. 5 Select Broadcast Heart Rate. The Forerunner watch starts broadcasting your heart rate data in the background. NOTE: There is no indication that the watch is broadcasting your heart rate data during an activity. 6 Begin the activity (Starting an Activity, page 3). 7 Pair your watch with your compatible device."
But in this case the activity will be run twice. On the watch and on the Edge. Or how should I understand it? The I drop one activity? Or save both and Connect does recognize it as one activity?