Driver drowsiness is a critical issue in transportation systems and a leading cause of traffic accidents. Common factors contributing to accidents include intoxicated driving, fatigue, and sleep ...

Heart rate variability (HRV) is a key indicator of cardiac autonomic function, making reliable assessment crucial. To examine the test-retest stability of resting HRV in healthy individuals, fifty ...

Wearables measure several aspects of health, and heart rate variability might be one of those. It may be surprising when your device informs you that your heart rate variability is high or low, but ...

Here’s what this health metric really indicates, according to cardiologists.

A new study reveals how the menstrual cycle influences the heart's nervous system and heart rate variability. Discover what ...

Apple, Garmin, Samsung, Google or Amazfit? I put these watches through the paces to see where they land on step, distance and heart rate accuracy. Vanessa is a lead writer at CNET, reviewing and ...