New research suggests the menstrual cycle may influence heart rate, stress levels and nervous system activity, highlighting ...

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 ...

A post hoc analysis found that the effect of transcutaneous auricular vagus nerve stimulation (taVNS) on cardiac and inflammatory stress responses was critically dependent on variability in baseline ...

HRV biofeedback training improved myocardial blood flow in coronary heart disease patients, showing potential as a lifestyle intervention for heart failure risk reduction. The randomized pilot trial ...

Heart rate variability isn’t just for elite cyclists—find out how tracking HRV can benefit every rider’s training, recovery, ...

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 ...

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. As a ...

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 ...