Same issue. Heart rate strap doesn't perform any better. Both the watch-base hr and chest strap hr work well with any other activity. It is only the indoor rowing activity that is a problem.
Over a year later, I am here to say I have the exact same problem and it is extremely frustrating. It really appears to me to be more of an error within software or something since it distinctly (and accurately…
So I have used a 235 and a vivo3 music with rowing machines and outdoor rowing and both have had the same issue. It's to do with the height of your hands and angle of your wrists making it harder to detect…
Same here, I have to wait 10-15min before the watch detect my activity.
Until that it keeps showing a rate around 100 but I am doing HIIT exercice my rate is more than 150 very quickly and the watch does not detect it.
Thank you! This has been frustrating me for months. Appreciate the solution!
Same issue here with a quatix 5. I looked for solutions or anyone with the same problem when I first noticed it but to no avail. As the problem persisted, I searched again, and apparently I found the topic. My workaround is to start another activity, wait until the watch detects my heart rate and then switch to indoor rowing. From then on heart rate monitor works perfectly, with the watch in the position where you would normally wear it. I have not experienced anything like this with other activities, so this must be a bug in the software. Garmin, please fix this!
I also have this problem, tried it even on my leg/ankle where the rate is around 120 (expected around 150), better then on my forearm where it counts as 60... Tried many places on forearm: under, above, right, lose, higher, lower, etc.
Same issue here with a Fenix 5. It's frustrating to see how it works well with my old basic Fitbit. Clearly a bug that needs urgent fix from Garmin.
Same here On my fenix 5. I'll do a 7k row and it will compute my max Hr at 110 which when a polar chest strap will get up to to 160 bpm.
I will try this tomorrow morning! Its been a major annoyance with my Garmin 735x that it works fine with cycling, running etc but hopeless on the Concept 2 - thanks for the advice & for once I'm looking forward to getting on the Rowing machine!