HR accuracy

Interesting....I think you're right - my cadence throughout the run was very close to the BPMs recorded by the F5.

It's a common issue with optical HRM for some people.
I've had the same issue with a Fitbit Surge, a Tomtom Spark and the Garmin Forerunner 235.
The irony is that I wasn't even aware it was an issue till I bought the 235 because the other watches didn't record cadence.

It was enough of an issue that I got rid of the 235 and decided not to wait for the F3HR and just got an F3 with a chest strap.

Now I have an F5 and I haven't even bothered trying to run using optical HRM. The optical HR is more important for me as an all day HR/activity monitor and for those rare occasions at the gym where I forget my chest strap, but I'd only use it for a run if I am desperate.

Cadence? OMG but you're right guys, that's why it climbs all of a sudden to the roof, it match my cadence (170-180)

I noticed that if i tight the watch super tight it would be more accurate and indeed maybe the watch is moving less! That's a shame.
My Charge 1 is closer to reality than an F5 :(

I'll continue to run with HRM then or just WHR when going to other sport/daily activity or if i forget my strap.

That said, with the previous FW it was not sensitive, with 2.40 it was even pretty accurate (made a comparison with F3 and HRM)

2900 calle

I'm going to try one more run tomorrow to test something out - apparently I've also been wearing the watch wrong (I've always worn my wristwatches below the wristbone). Will see if it's more accurate wearing it higher up the arm. Thanks for all the help!

Worked well at first.....

My f5 wrist based hrm was working well initially, now after a few miles it seems to spike and lock into a high rate even at minimal effort. I've had to turn on and off several times during my last few runs. Quite disappointing since it makes the nice load and recovery features pretty much useless.

Very, very disappointing....

My f5 wrist based hrm was working well initially, now after a few miles it seems to spike and lock into a high rate even at minimal effort. I've had to turn on and off several times during my last few runs. Quite disappointing since it makes the nice load and recovery features pretty much useless.

OHR works fine when I'm resting (sleeping, watching TV, reading, driving too). As soon ad I stand up and move, Bpm jumps by 30-40%. During activities, it's a disaster!
Here is a comparison between F5 (wrist hrm) and my old FR 405 with a chest strap. It's a 2 hours walking. Average bpm is 109 vs. 71 (+42%); max bpm 164 vs. 103.


I tried all possible positions of F5 on the wrist, the strength of the band, I also shaved my skin. The result is always the same.
Perhaps a faulty unit?
I would like to know if there is someone satisfied with F5 OHR during activities.

Seems to be way better with FW 3.22, got updated and 2 runs the HR is way more reliable.
I'll give a try and compare to my HRM on Fenix 3 but no doubt there is a serious improvement and no more cadence "interference"

I only dislike this kind of 10s latency but i assume that's how WHR works on any watch.

Same here - since 3.22 no Problem with OHR!
Did some test runs with OHR and the chest strap and the result is pretty good until now.

There is now a new beta release: 3.30 (see relative thread).
I updated to 3:30, but my problems with OHR still remain.
I noticed that WHR software version (20.03.20) is the same as in official release 2.90; so no software improvement on this side.
I'm hopeless.....

3.22 works very well for me, had 3 run, including a 1h30 today, and HR wasn't a single time out . Tested with my HR strap on and F3.
Only the latency where my HR was showing as going up when i was going down the hill, 10s later it reduced by 10bpm (next refresh i guess).

This behaviour is I believe what you get on any WHR watch... maybe less maybe more but it's not as accurate as a strap. I'll wear straps only when in need of running dynamics or on races.
As for long training, no 30s interval, that's working very well (now).