1. The Swiss Federal Institute of Sports in Magglingen https://pubmed.ncbi.nlm.nih.gov/31004219/ 2. 197 authors cited the paper to this date: https://scholar.google.com/scholar?hl=de&as_sdt=0%2C5&q=RR+interval+signal+quality+of+a+heart+rate+monitor+and+an+ECG+Holter+at+rest+and+during+exercise&btnG= 3. The US Army tests the Polar H10 with an EQ 02+ Lifemonitor (costs of the Adinstruments Equivital Starter Pack $ 2701) with Equivital Black Ghost software (request a quote) which has only ECG noise …