What is HRV? What the smartwatch and Oura ring metric can really tell you about your health

Source: New York Post

It might be time to start listening to your heart. In recent years, millions of Americans have incorporated wearable health trackers like smartwatches and Oura rings into their lives, with studies showing that at least 1 in 3 US adults are actively using them. While metrics such as blood pressure, sleep duration and daily step counts are familiar, the rise of wearable technology has also cast a spotlight on a lesser-known data point: heart rate variability, or HRV.