We used Oura Advisor to assess heart rate trend over four weeks with the Oura Ring 4, and here are the results so far.

If you wear a fitness tracker, you’ve likely seen a stat labeled “HRV” pop up on your screen. But what does it mean, and does it matter? Short for heart rate variability, HRV has become a popular ...

From left, Manuel Hernandez, Ayse Dogan and Richard Sowers watch as graduate student Laila Shaaban walks on a treadmill while a “smart shirt” tracks electrical activity in her heart. In the background ...

Brazilian researchers reveal that even mild cases of COVID-19 can temporarily reduce heart rate variability, with stress on the autonomic nervous system lasting up to six months—especially in older ...

Heart rate variability biofeedback (HRVB) can reduce negative affect, craving, and substance use among individuals in early ...

(Helsinki, Finland, Saturday, 21 June 2025) New research, presented today at the European Academy of Neurology (EAN) Congress 2025, has uncovered a powerful link between nighttime heart rhythm and ...

Heart Analyzer this week reached version 10, bringing some major improvements and changes to the popular heart health app including a new dashboard experience, a refreshed Watch app, enhanced charts, ...

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 ...