Heart Rate Way Wrong

This is my second post about this device and I'm starting to scratch my head about why I spent the money.

I worked out this a few mornings ago-- hard rowing workout. My HR was recording a BPM of around 90 -- way, way lower that it actually was. My actual HR was around 150-160.

Last night I took a really brisk walk, including up a long hill. 5X+ showed a heart rate of between 59 and 65. Actual HR was around 110.

So what's gives?

Any ideas about why this would be so far off? I selected the "row indoor" activity, obviously. I tried both wrists.

Between this giant inaccuracy and the useless (and very misleading) sleep tracking, I'm starting to think this device is no good.

? Things can't be this off.

Top Replies

Bernhard_Winter over 5 years ago +7

Welp, this is my second post about this device and I'm starting to scratch my head about why I spent the money.

I worked out this a few mornings ago-- hard rowing workout. My HR was recording a BPM…
Outside over 5 years ago +6

Here we go again? Not sure what you mean by that, but if you're implying that I don't understand the limitations of optical HR, then slow down and please carefully read the following.

1. I've read…
SAHO over 5 years ago +3

I have a suspicion that the sensor/software sometimes get a false «lock» on half or double the actual HR, i.e. showing 120 when it’s actually 60 or vice versa.

All Replies

0 CMA-CPH over 1 year ago in reply to Jukueja

Your watch is a generation older than my F5P, but there was an issue with HR when I used an ANT+ connected Tempe sensor on my F5P. It was fixed in a later firmware update.