I regularly row on a concept 2 rower and see wild variations in my heart rate when logging data using my whoop band. Typically I’m seeing very high readings - shooting up from 150 - 170 - even when perceived effort is in the level 1 to 2 range. I have started using a Polar chest strap to see if this is an issue with the recording or if in fact my heart rate is spiking. The Polar readings read consistently in the 110 - 130 range for level 1 / 2 steady state endurance and for the same workout I see readings that can be anywhere between 20 and 50 BPM higher from my Whoop strap.
I am confident that the Polar reading is accurate and it matches with my perceived effort during the exercise.
I have not seen this issue with my Whoop HR reading during cycling or running, only when using the rower.
Is this a known issue and is there any advice on how to address this?