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

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

Scientists have a lot to learn about the connection between sleep and stress, but one thing is clear: They're both trending in the wrong direction. As revealed in a recent Gallup poll, the proportion ...

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 ...