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 ...

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

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, ...

It’s been known for decades that heart rate variability (HRV) during labor signals how a fetus is responding to stress. Lower HRV—a lower variation in heartbeats—is even a risk factor for sudden ...

Even mild dehydration can negatively affect your brain functioning and attention span, so it could be holding you back at work and getting in the way of your goals. Drinking a glass of water could ...