Fitness trackers and smart watches are widely popular wearable devices that measure several types of health metrics, including step count, calories burned, sleep quality, Vo2 max and heart rate.

Heart rate variability (HRV) is the variation in the time between two consecutive heartbeats over a specific period. Doctors may use HRV as an indicator for certain aspects of a person’s health, ...

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 ...

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 ...

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 ...

NEW YORK (Reuters Health) - Willpower is a lot like muscle strength, a new study suggests -- some of us have more of it than others. And while people may be born with an innate capacity for ...

What Does a High Resting Heart Rate Mean? The ups and downs of HRV can be so tricky to navigate, in fact, that most doctors, even cardiologists, don’t factor it into treatment plans for their patients ...

Anne R. Crecelius does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...