Heart Rate losing lock during activity?

[BrianNH]

I went for a run with my 42 SS ML today and at first the HR seemed responsive and about where I would expect it. After about 5 minutes, the hr colors turned grey, the heart stopped beating and the numbers stopped changing. It remained this way for a while and then several minutes later it showed another really low locked reading. Eventually it sorta worked again. I tried adjusting the watch on my wrist, even tightening it more than it already was and nothing. This seems more like a software glitch imo. Anyone else see this?

 

[NAYo2002]

I think it's intentially only samples HR randomly to save battery life.

 

[BrianNH]

It samples every 10 minutes normally, but I was pretty sure when using the workout app, it samples continuously using the green lights (I could see they were on the whole time)

 

[noah82]

Just did a 1 hour boot camp workout which i normally burn 850+ calories in an hour and the Apple watch said that I only burnt 499. Almost every time I looked the watch couldn't find my heart rate.

I was wearing it two fingers above the wrist bone and it still kept losing heart rate. Very disappointed so far.

 

[NAYo2002]

Just did a 1 hour boot camp workout which i normally burn 850+ calories in an hour and the Apple watch said that I only burnt 499. Almost every time I looked the watch couldn't find my heart rate.

I was wearing it two fingers above the wrist bone and it still kept losing heart rate. Very disappointed so far.

How do you know the 850+ Is correct?

 

[noah82]

How do you know the 850+ Is correct?

I had previously used a Mio Alpha and Fitbit Surge before getting the Apple watch and both were consistent.

 

[Marshall73]

I had the same when using my rowing machine. I tightened the strap 1 notch and after that it was ok for the rest of the workout.