As a cardiovascular physiologist, I measure heart rate in nearly every experiment my students and I perform. Sometimes we use an electrocardiogram, such as you’d see in a medical clinic, which uses ...

Thanks to wearable devices, you can use all sorts of metrics to keep track of your health. You can check your weight, blood pressure, the number of steps you take, heart rate and more as you go about ...

Here’s what this health metric really indicates, according to cardiologists. Fact checked by Isaac Winter Reviewed by Vivek Cherian, MD Heart rate variability (HRV) is the difference in the timing ...

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 ...

If you own a fitness tracker, you’ve likely come across the term HRV (heart rate variability). You may have even seen people proudly posting their HRV numbers on Instagram. But what can the ...