PDF] Comparison of the Polar S810i monitor and the ECG for the analysis of heart rate variability in the time and frequency domains. | Semantic Scholar
POLAR ELECTRO S610 USER MANUAL Pdf Download | ManualsLib
Polar manuals
Comparison of three mobile devices for measuring R–R intervals and heart rate variability: Polar S810i, Suunto t6 and an ambulatory ECG system | European Journal of Applied Physiology