A few of the most important insights are heart rate variability (HRV), which describes the difference in time between the ...

Fitness trackers and smart watches are widely popular wearable devices that measure several types of health metrics, ...

The rhythmic beating of your heart tells a more complex story than most realize. While standard health assessments typically focus on heart rate, the subtle variations between individual heartbeats ...

We know the beat of our heart varies over time, increasing with exertion and slowing with rest or meditation. But, stable as those variations may appear, they vary even within those intervals. Dr.

Most fitness trackers offer a wealth of heart-rate data. Here’s how to make sense of it. By Talya Minsberg If you wear a smartwatch or fitness tracker, you likely already have access to a steady ...