Wrist HR worse accuracy?

[aroo7]

@efejota stop kidding yourself wrist-based heart rate measurement during an activity doesn’t make much sense. The wrist is a poor place to measure your heart rate. It flexes, gets cold quickly and, moreover, has few blood vessels. Wirts OHR in S9P is really good and does its job but outside of training when you rest and recover.

[Dimitrios Kanellopoulos]

@efejota said in Wrist HR worse accuracy?:

There are a lot of 0 reading. You can see them in the blue lines. In comparison, the belt almost had no failure

Those are not 0\s your app is converting them

[Efejota]

@dimitrios-kanellopoulos I simply downloaded the GPX from QS, in fact, and extracted as CSV to be used in Excel (after struggling in finding a free alternative to compare two .fit or .GPX files, any advice?). Are they not zero readings?

J

[Efejota]

@aroo7 I do not fully agree. My experience when I started using S9P in August was impressive. It was really accurate. Of course I do not pretend it to be as precise as a belt or an ECR, but those differences are substantial. If I have to believe those readings, I should visit the doctor. That is why I am trying to understand why, because it is obviously more comfortable to wear the watch, without the belt.

I have an additional question. Is it possible that readings can be affected by movement? Even with the watch properly attached to my wrist, in slow exercises (hiking, for instance), numbers are very precise (I assume that readings are poor if the watch moves constantly around my wrist, I refer to watch remaining at the same place and affected only by arm movement).

J

[isazi]

@efejota said in Wrist HR worse accuracy?:

I have an additional question. Is it possible that readings can be affected by movement? Even with the watch properly attached to my wrist, in slow exercises (hiking, for instance), numbers are very precise (I assume that readings are poor if the watch moves constantly around my wrist, I refer to watch remaining at the same place and affected only by arm movement).

Measurements are affected by movement, and by what you do with your hands (together with temperature). Movement may add noise to the readings, what you do with your hands and temperature may affect blood flow.

[Egika]

@isazi and using poles almost ruins everything…

[sartoric]

yep, as you’re flexing muscles repeatedly

e.g. weight lifting is one of the most challenging sport to monitor with WHR