I'm not sure if I have the wrong expectations regarding the HR algorithams or if I have a particular problem but having just spent 45 mins on Zwift using my Polar Verity Sense. In comparison my 955(without starting an activity) persistanly read 40-50bpm lower. both worn on the same arm.
I'm not sure if by starting an activity it would have sparked the watch sensor into action but I would have expected it to have roughly tracked given the time period?
I tried the usual or adjusting the watch, position, tightness also rebooted it but it remained the same
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