Rob ter Horst often mentions in his reviews on YouTube that his Polar H10 is an ECG device but is it the most accurate ECG device for this purpose? The group of the cardiologist Milind Y. Desai used for their study the Q-Tel RMS: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6732081/ We did not check all the details of these devices. …