Newbie here - first run with my Forerunner 225. Downloaded data after run to Garmin Connect. Running data is there but no heart rate data. Any help? Thank you.
Did you have HR data displayed on your FR225 while you were doing the run? If not then maybe the HR strap is not correctly paired with the device.
If you did have HR data displayed, then you might post the .fit file of your activity in the FR225 forum and maybe someone there with the .fitfilerepair tool and familiar with the peculiarities of the 225 will take a look and see what's up. However it should be the original file from the device and not one exported from Garmin Connect unless it specifically says "export original", which I don't think they do anymore.