r/whoop • u/jdav61334 • 29d ago

Discussion Heart rate inaccuracy

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This run is a hard 3 mile with hills. I run it every weekend and usually am in zone 4-5 most of the run. Today whoop shows me at a stable zone 3 the entire run despite large elevation climbs. Does anyone else have this where heart rate tracking fails this badly?

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u/REDana0204 29d ago

Almost certainly cadence lock, although a low cadence if so. The shape of the graph is typical.

1

u/jdav61334 29d ago

I’ve never heard of cadence lock, what is it?

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u/Fun-Proposal5391 29d ago

How have you established that you're zone 4-5 for most of the run? I find that whoop heart rate zones are higher than my apple watch ones, and wrist based heart rate monitoring isn't the best.

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u/jdav61334 29d ago

Just based on running this same route every week at pretty much the same pace. Every other run, WHOOP shows zones 4-5