Heart rate too high

Search the forum or follow some of the links to the right

I am assuming it is the block of high HR from about 50 mins to 1hr10 that is of concern?

The usual cause of high HR while running is "cadence lock" where the watch moves on your wrist allowing external light to enter the sensor in a rhythmic way with each arm swing. The sensor picks up on this external light rather than your HR, and a recorded heart rate in the 170-180 range is typical of this.

To prevent this, the band should be pretty snug on your wrist, and the watch positioned well away from your wrist bone - this ensures a better seal against external light. Personally, I find I have to have the band 1-2 notches tighter for accurate HR while running, than I do for 24/7 monitoring.

Hi, yes that's where the spikes are.. (about 1 hour) i had read previous posts and do wear the watch tight.. during todays WOD i noticed the same event so switched the watch over to my left wrist (including trying on the inside of the wrist like during a kettle bell push press).. the readings were still recording higher BPM! My myzone recorded 70 bpm at the same time the Garmin 130 ish.. undoing the strap and holding the watch onto my forearm (right up towards the elbow) seemed to restore the correct reading.. why would both left and right wrist have the same anomaly?  The attached pic shows where the error occurred..  

Seeing (kind of) the same behaviour at times.  Will follow suggestions as mentioned 

(Can't seem to upload example...)

So yesterday (during an interval rest) I had the same problem.. you can see the Garmin was reporting about 110 BPM  where as my zone was 55bpm. The watch was tight and snug with no daylight getting around to the LED’s. any suggestions on this please? 

It does this.  Contrary to opinions, not all devices are this bad, the AW6, in my experience is far more solid.

The biggest problem is that all of the Garmin metrics are built around HR, so you kiss them good bye too when this happens.  Basically, you'll need a chest strap, or get one of the forearm / bicep one's.  All of them are better than what this watch offers.

This is so true…. Last year a purchased a Myzone chest monitor to keep accurate HR data… myzone support advised not to pair to the watch due to false data being recorded.  

I think the cadence lock problem isn't because light is entering behind the watch. I believe it's because the blood in your arm moves rhythmically with your arm swing, and the watch reads the ebb and flow as your heartbeat. So tightening your watch band will likely have no effect. Mine does this on certain runs and the tightness of my watch band does not affect it at all.