After raising this here, I’ve been scrutinizing the HR data when running. In short, I don’t believe it. It was totally believable prior to the last firmware update, but now it takes longer to lock, and won’t actually lock unless the arm is dangling i.e. if the forearm is point upwards it refuses to lock the HR.
As far as I’m concerned it’s as though the OHRM is not as sensitive/responsive, and struggles to register meaningful data when the forearm isn’t pointing downwards. I get data, but it’s not correct. If I look at my HR data prior to the fw update it’s solid and looks logical, but there’s no logic, or sometimes a lack of consistency to it now on many of my running activities.
Boooo said the crowd, basically! Booo!