Here’s what HRV is, how it works and what can cause it to rise or fall.

Heart Rate Variability, often shortened to HRV, has become one of the most popular recovery metrics in fitness. While resting heart rate tells you how many times your heart beats per minute, HRV ...

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 ...

Heart rate variability, or HRV, is quickly becoming one of the most important metrics in modern fitness, and for good reason. Unlike heart rate, which tells you how fast your heart is beating, HRV ...

Fitness trackers give us unprecedented information about our health, especially when it comes to our hearts. Doctors explain ...

You might be familiar with HRV—heart rate variability—as a popular training tool for workouts and a biomarker for measuring exercise recovery. Beyond exercise tracking, heart rate variability has a ...

New research, presented today at the European Academy of Neurology (EAN) Congress 2025, has uncovered a powerful link between nighttime heart rhythm and future health conditions, even in people with ...

Your blood work looks great! Your cholesterol, A1C and fasting glucose are all in the healthy range. But your fitness tracker ...

Obstructive sleep apnea (OSA) and insomnia are the two most prevalent sleep disorders, often co-occurring in a condition termed comorbid insomnia and sleep apnea (COMISA). While autonomic nervous ...

A new study from the German Institute of Human Nutrition Potsdam–Rehbruecke (DIfE) and Charité—Universitätsmedizin Berlin ...

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 ...

Gestational diabetes mellitus (GDM) is defined as glucose intolerance with onset or first recognition during pregnancy 1, and is one of the most common adverse pregnancy outcomes (APOs). The ...