Heart Rate “spikes” when pairing Coros HR armband with Run
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I’m seeing random heart rate spiking when using my Coros HR armband
What can I do to resolve this? Or is this a bug with the Bluetooth connections for the Run Watch?

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This is not an issue with Coros, but an issue with the Suunto run (I have the same issue with a Polar hr sensor). They admitted it when I emailed support and said they’ll look into it (that was a couple of months ago),
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I have a Coros armband and a Coospo belt. I’m going to test whether I also have HR spikes.
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Tested today with Coospo belt – seems fine to me : (just when starting up, but it might be because of the belt)

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@zagazoo Is the firmware on your armband up to date?