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HR Cadence lock !!!

I just upgraded (I thought..) my Coros Pace 2 to a 955 a few days ago. Not sure yet it was a smart move ; 2 things I don't like on Coros are the lack of swimming drill mode and the dreaded crown/dial. But I have not been impressed that much by 955 (yet ?).

Typically, the optical HR have been not very reliable (compared to... Coros !!!). I did some interval training yesterday, and it was all over the place.

I had a 15K cool run today, and I realized at the end of the run that HR did lock to Cadence ! Could not believe it ! I had this issue YEARS ago with the very first firmwares of the 735XT. I thought this could not happen anymore.

Anyone else experienced it ?

Thanks for feedback !

955 is up2date (18.23)

0 davidwh.dai over 1 year ago

I’ve been experiencing the same thing on my FR955. For some reason, HR locks into cadence after about 20-25 mins of running. This is something I’ve experienced for over a year now unfortunately. I’ve been forced to use a chest HR strap because of this but it’s really disappointing, and i definitely would not purchase another garmin again. I don’t expect the HR data on the watch to be 100% accurate, but it’s unacceptable when it jumps 30-40 BPM randomly and then just locks in to your cadence for the rest of the run

0 9869093 over 1 year ago in reply to davidwh.dai

I had a FR945 before and no problems. But the FR 955 is not good, since months.

0 4684381 over 1 year ago in reply to 9869093

davidwh.dai said:
HR locks into cadence after about 20-25 mins of running.

Absolutely the same thing today with FR245, the weather was +25C , after 18 minutes the problems started.

0 global_local over 1 year ago

Stef said:
HR did lock to Cadence

Can you please show your HR+Cadence graph? Can't understand how it can be on a modern OHRS... And how you detected it. Thanks in advance.

0 davidwh.dai over 1 year ago in reply to global_local

not the best plot, but you can see that around the 27 min mark, HR jumped up and stayed around 170-175 (with the exception of a brief pause at a red light). my cadence was around 175

0 global_local over 1 year ago in reply to davidwh.dai

Ugh! A very unusual and unrealistic plot... At first - such a stable HR? Seems not to be realistic. And if you go up - see 12th min - HR goes down?? Can't believe that you were so tired..

No, it is surely not a good HR reading.

Normal reading should be like this:

Vary and reacting to a cadence/altitude changing.

0 DaKo over 1 year ago in reply to global_local

I disagree about the flat HR line. Ran a 10k this morning and this is how it looked like, very stable: