Strange behaviour with Garmin HRM
-
Does anyone know here how it works under the hood? I mean the belt transmits ready to use value of HR or the watch does some calculations before showing the data on the screen?
-
@Mff73 Yes I only use the belt and I would know if I am starting an activity using OHR instead. As I wrote previously, am I even wearing the watch on my jacket sleeve so I wouldn’t expect HR readings from my wrist.
-
@TonyG Thanks for the advice, I’ll try the strap position you suggested there. Today it happened again but luckily the HR went back to normal in a few seconds after I paused and restarted the activity.
-
@false I can only answer for the Suunto sensor, although I believe most chest straps work the same: the sensor sends IBI to the watch (the time in milliseconds between two beats) and the watch uses that to compute heart rate (watches may use different algorithms, especially on the filter side, to do that)
-
After some time I am more and more convinced that this problem is related with wearing a jacket.
When running with just a synthetic t-shirt on warm days I haven’t experienced it. Yesterday I ran again with t-shirt plus jacket and the HR values were all over the place. I did some research, and it seems to be a known issue.
It’s just strange that the HRM is sending correct values, as displayed both on the Garmin step counter and on the S9PP on the pause screen, whilst the wrong values are displayed (and recorded) on S9PP during the activity. -
@Francesco-Pagano
maybe a data filter process difference between activity pause and activity recording ? Only Suunto expert in FW could say. It would not be logic, but who knows. -
F Francesco Pagano referenced this topic on
