Rob ter Horst’s main reference device is the Polar H10 which is scientically validated in a validation paper which was partly funded by Polar: https://pubmed.ncbi.nlm.nih.gov/31004219 He is post-doctoral researcher from the CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences in Vienna and is specialized in biological data analysis, and does scientific … Continue reading 1640. How can we trust in scientific studies about the accuracy of consumer grade HRMs which are partly funded by sports watch companies or by other intransparent funds?