Merge heart rate data with imported GPX track

Heart rate data sampling for 24×7 tracking is not of fine enough granularity for any meaningful analysis with respect to vigorous exercise anyway, even if you're of the belief that something is better than nothing at all.

ASmugDill Newer watches such as Fenix 5, 935, and 645 sample HR once per second in 24/7 mode, but there's some controversy about how much of that is actually stored/available on Garmin Connect. Garmin claims all the data (86400 seconds per day) is recorded, but in practice, people have only been able to retrieve one-minute averages
https://forums.garmin.com/forum/on-the-trail/wrist-worn/fenix-5-5s/154687-

mbirth I know this is not exactly what you want, but I guess you could try:
1) Exporting your all day HR to FIT. (Unfortunately you only get one-minute averages.)
2) Converting your TCX to GPX: https://www.gpsies.com/convert.do
3) Merging the TCX and FIT here:
https://gotoes.org/strava/Merge_Heart_Rate_TCX_With_Position_TCX.php
(I have no idea if it'll properly sync up with the timestamps tho)

mbirth I know this is not exactly what you want, but I guess you could try:
1) Exporting your all day HR to FIT. (Unfortunately you only get one-minute averages.)
2) Converting your TCX to GPX: https://www.gpsies.com/convert.do
3) Merging the TCX and FIT here:
https://gotoes.org/strava/Merge_Heart_Rate_TCX_With_Position_TCX.php
(I have no idea if it'll properly sync up with the timestamps tho)

Thanks, this was my backup plan. I'll play around with that for now, but I'd much prefer if Garmin had that feature built-in (as they already sit on my HR data).

I'd like this feature to be integrated too. As a minimum it would be good if the HR data the device recorded was used if you record a manual activity. I forgot to start a gym activity and even though the HR data was logged by the device I can't see how to get connect to append it to the manually added activity...