Hi Whoop Support Team,
I recently purchased the new Whoop MG device and have been using it primarily during cycling sessions. I’ve noticed that the heart rate measurements reported by the device differ significantly from those recorded by my Garmin heart rate monitor, which I consider highly reliable.
Could you let me know if this is a known issue with the MG model? If so, is your team working on a fix, and do you have an estimated timeline for resolving it?
I’d also like to point out that I did not experience these discrepancies with the previous version of the Whoop device.
Thanks in advance for your help. I look forward to your response.
Best regards,
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I have the same issue. Not sure what it is about cycling that causes whoop so many problems. I have been talking with support and their canned reply is make sure it is snug. It is because other daily measurements seems fine, Sleep, Rest, Walking etc. Just way off when cycling. I am starting to think it’s vibration through the handlebars that is confusing the device. It’s very annoying because everything else is awesome but since my only real activity is cycling I can’t trust strain and the suggestions it is giving me. 
Do you have whoop MG now? Before it, with whoop 4 do you have the same problem? In my case I think that with whoop 4 the data is better.
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Yes Whoop MG. I never had a whoop before. Today’s ride was almost perfect. But I seem to get good days and then a few insanely high HRs, well into the 170s. I did move it slightly today but not much. Over two fingers now. Maybe this is the key 
Pretty happy with Today’s ride. Wasn’t a big effort but matches up pretty good. Hoping it continues but worried when I do a big effort it will go crazy again. 
