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 ...
Stress is an imprecise term and a difficult thing to measure. But technological advances mean it’s now simple to capture what is perhaps the best proxy for our response to it: heart rate variability, ...
Add Yahoo as a preferred source to see more of our stories on Google. 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 ...
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