Heart rate drops during exercise

[madasamoht]

Hi everyone 

Recently I've noticed that my heart rate reading start to 'sink' during activities. I tested it out tonight rowing, keeping a constant pace. 

Despite keeping effort constant my heart readings drop right down, then recover. 

I've had my charge 2 nearly a year and this is a new issue. Does anyone have any ideas?

[Ponybird]

Yes. Noticed today while on treadmill. It read 64 when I know it was much higher. I did the update last night . Was wondering if that's the cause for incorrect reading.

[schmict]

Mine does the same when in the middle of a walk.  Drops to 60-70 bpm.  I am thinking it does this whenever I flip my wrist to see my heart rate during exercise.  I think the motion of checking your heart rate makes it drop out for a few minutes.....very frustrating.

[Ocean234]

I have the same problem when on the treadmill. Lately I've had difficulty keeping my HR value over 125.  My HR values sink and in fact when down to 69 when I manually checked and know it was well over 120!  It also struggles to read a HR so I often see --.  Very frustrating when I want to see my stats even though I know I'm getting a good workout.

Another (related?) problem is that my Charge 2 continues providing a HR value even when I take it off.  I took it off for about 15 minutes and gained 12 active minutes with a peak HR of 136!  I tried some of the suggestions here (turning off HR and then back on, syncing) and resetting the Charge 2.  I will know soon enough if this solves it. 

[Kwichang]

My heart rate also sinks, but faster than your graph and it comes back up fast too.  My average heart rate is higher than it was a couple years ago also, like up to 170, even though I am slower but i feel fine. Is the heat rate ever inaccurate on the high side?