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 ...

Thanks to wearable devices, you can use all sorts of metrics to keep track of your health. You can check your weight, blood pressure, the number of steps you take, heart rate and more as you go about ...

Aparna Balasubramanian, MD, discusses the importance of measurements such as heart rate variability, but also that there’s no such thing as just 1 biomarker that will give all information for ...