The Polar Loop launched in early September 2025 as a subscription-free alternative to the Whoop band. This is a little over a ...

Depression is not only a disorder of mood but also a condition that affects the heart and blood vessels, and can carry ...

SEOUL, South Korea, Jan. 19, 2026 /PRNewswire/ -- Digital healthcare startup 6Letters today announced the official launch of ...

By tracking biometrics like temperature, respiratory rate and heart rate, the Oura Ring can catch early signs of physical ...

These days, it may seem like there’s a million different data points that you’re supposed to keep track of—hello, steps, sleep, and recovery scores!—and it’s difficult to know which ones are worth ...

Objective: To evaluate the Heart rate variability (HRV) in different blood pressure populations, analyze its influencing factors, rank their importance, and propose targeted health strategies. Methods ...

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 ...

Whoever we are, whatever we’re doing, we have a measurable heart rate. It’s a pretty clear sign of being alive. But what should your heart rate be when exercising? When we exercise, our heart rate ...

This article was made possible by the support of Yakult and produced independently by Scientific American’s board of editors. Earlier this year I got an Oura ring to track the state of my health. Soon ...

Sure, they're fun to check—but a cardiologist who owns every major fitness watch explains which numbers are more distracting than beneficial. Jeff Wessler, MD, MPhil, is a board-certified cardiologist ...