The Cleveland Clinic in Ohio published two papers about this topic: https://journals.lww.com/acsm-msse/Fulltext/2017/08000/Variable_Accuracy_of_Wearable_Heart_Rate_Monitors.22.aspx https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6732081/ These where written as far as we know from cardiologists from the Cleveland Clinic in Ohio. The studies where about accuracy studies of sports sensors for sporting activities. The authors where cardiologists. Why do cardiologists study sports sensor accuracy? Did they do …