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

- Link: https://www.widthness.com/heart-rate-variability-what-to-know-about-this-biometric-most-fitness-trackers-measure-2/
- Published: 2023-01-05T09:00:43-06:00
- Author: Curated by John Wysocki

Photo caption: An increase in this particular biometric is a good thing. Photo credit: visualspace/E+ via Getty Images. Article by Anne R. Crecelius. The Conversation – December 26, 2022. 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 it to be. As a cardiovascular physiologist, I measure heart rate in nearly every experiment my students and I perform. […]   Click here to view original web page at theconversation.com Curated by John Wysocki See Full Bio