I've had an Edge530 for a while and recently acquired a Forerunner945.
The former I plan to use for cycling activities while the latter for all other exercises + daily physiological metric measurements.
When I cycle, I initially recorded on both devices and then deleted one on Garmin Connect later. But, it seems like this doubles the training load and is not ideal because of that.
So now I record on the Edge 530 with a chest HRM, while wearing the FR945 passively, with Physio TrueUp enabled on both devices.
Will the heart rate that shows up on Garmin Connect for the duration of my activity be the passively-collected wrist-based Forerunner heart rate data? Or will that be 'replaced' by the chest-based Edge heart rate data after I save the activity on the edge?
Also, is the above method a good way to 'use' both devices? Or should I just record everything, even rides on my bike, with the Forerunner? In this case, I would still record with my Edge as well as I like using the Edge while cycling, but I would delete the Edge activity after the ride.