I hate to wear the HR strap but I have the Forerunner 735XT with built-in optical HR too. How can I sync the Forerunner's HR with my Edge 520?
The problem: tracking my rides with the Forerunner 735XT gives not so good results as with the Edge. Using both show differences in speed, time and distance. It's also annoying that auto-snyching with Strava has both activities online.