The accuracy value of 99.6 % of the Polar H10 is not the accuracy value against a motion artifact free ECG device

The mentioned study says only something about the accuracy of the algorithms of the Polar H10, and says nothing about the accuracy of the Polar H10 against a high quality motion artifact free ECG device. The Polar H10 was not tested against a high quality motion artifact free ECG device: in the study mentioned above. …