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Charge 2 suddenly registering higher heart rate during run

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‎11-18-2020 00:32

‎11-18-2020 00:32

hi there

I've been using Charge 2 for years and when I run either 5k or 10k always spend most of the time in cardio zone, almost none in peak.  but since 31st October, when I run it registers almost all in peak and much higher heart rate overall.  I don't feel any different and I'm not doing anything differently so wondering if it's a fault/quirk of the device.  Anyone else found the same?

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