Heart rate variability measures the variation in time between successive heartbeats, providing insights into the balance between the sympathetic and parasympathetic nervous systems, which influence ...

What is heart rate variability? We combed through the latest studies to find out what this metric reveals about your health. When you purchase through links on our site, we may earn an affiliate ...

If you wear a fitness tracker, you've likely seen a stat labeled "HRV" pop up on your screen. But what does it mean, and does it matter? Short for heart rate variability, HRV has become a popular ...

Heart rate variability typically decreases during stressful situations, although the heart rate increases. Managing stress levels can mean a more variable heart rate. Exercise and relaxation ...