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.

If you own a smartwatch or have been around people who own smartwatches, you may have encountered a metric called HRV, or heart rate variability. On the internet and social media, it certainly seems ...

M odern smart watches can measure an array of health indicators. Step counts and heart rates sit at the simpler end, while ...

A lower resting heart rate indicates an efficient heart and a higher level of parasympathetic activity. When you’re at rest, your nervous system ideally minimizes sympathetic activity, so you’re ...

Did you know you can customize Google to filter out garbage? Take these steps for better search results, including adding my work at Lifehacker as a preferred source. Besides measuring heart rate and ...

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 ...

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

Unlike your resting heart rate, which you can take with nothing more than a stopwatch and a finger to your pulse, tracking ...