Knowledge is power when it comes to performance, these picks help you get it.

What is heart rate variability (HRV)? As popular as the metaphor may be, a healthy heart doesn’t beat as regularly as a metronome. In fact, it changes its rhythm with each beat. Heart rate variability ...

New predictive test: Samsung and a Korean hospital tested Galaxy Watch 6’s ability to forecast fainting episodes up to five minutes ahead with 84.6% accuracy. How it works: A PPG sensor monitors heart ...

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 ...

Heart rate variability has become the wellness scene’s favorite recovery score, but experts say most people misunderstand the ...

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 ...

An increased heart rate from exercise had minimal impact on driving and wedge performance. An increased heart rate from anxiety, pressure and consequence activates the sympathetic nervous system in a ...