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Heart rate variability – what to know about this biometric most fitness trackers measure

Published: December 26, 2022 3.52 pm EST Author Anne R. CreceliusAssociate Professor of Health and Sport Science, University of Dayton Your heart beats around 100,000 times every day. Heart rate is a key marker of cardiovascular activity and an important vital sign. But your pulse is not as steady as a precision clock – nor would you want...