The chest strap monitor closely matched readings from the electrocardiogram (EKG), which is the gold standard for measuring the heart's activity (level of agreement with EKG, rc=.996; 1 being ...

Polar promises that its chest strap has a high level of accuracy. Users can use it with the Polar Beat mobile app, and also transfer their data to the Polar Flow app; the OH1 can also be used with ...