Heart rate not changing on activity.

I have my wrist HR on all of the time and link Bluetooth headset while I listen to Spotify. 
When I set off on an indoor row my HR is about 70 and 4km in and after 16mins it has bounced around 65-85. Now I can tell after that excursion it is actually nearer 150. 
Is it the case the device can’t handle all the sensors at one time? 
Surely a watch with these features can hack it? 
Infact, the HR goes up once I stop the activity. It will top 100 on a non cardio exercise.

Also when on a run the music stops and stutters when playing on Bluetooth. I am so disappointed by this device.

Any tips or suggestions? Charge is good on device. 

Thanks

  • Nothing to do with number of sensors.  Search and you will find thread after thread (and not just Garmin) on how limited wrist OHR sensors are for sports such a rowing (weight ligting etc) due to the movement, stretching, tightening of the wrist - just impossible for the sensors to properly read the blood flow under the skin.  Some have luck changing the location of the watch (higher up perhaps) but I suspect you will likely find a chest strap or upper arm optical sensor the best bet.  Here is one of the many threads Erroneous heartbeat data when rowing - Forerunner 935 - Running/Multisport - Garmin Forums .  Because I'm sure people will jump in with this - yes some sensor designs handle this better than other just as OHR works better with some people,

  • Thanks for your thoughts on my query. I have since done a little experiment with my watch while indoor rowing and playing Spotify through my Cambridge Audio Melomania Bluetooth headphones. 

    When I have nothing playing and the headphones not connected the watch works fine and records HR strokes and time fine. 

    So I suspect it’s the type of headphones that impacts the performance.