A marathon pushes the human body close to its limits. Legs tire, lungs burn and the heart works hard for hours on end. For ...

The issue: Many runners (particularly women) report that their fitness trackers tell them they’re exercising in a higher zone ...

Most modern smartwatches offer countless insights into how our bodies perform. But what is this data really telling us about ...

To manage stress, seek mental health support, whether that’s from family and friends, or a therapist, says Dr. Naidu.

I felt fine, but my Whoop data told a different story. Paying attention led to early detection and a successful treatment.

Exercise is vital for heart health, but excessive or unstructured training can place dangerous stress on the heart.

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 ...

Cristiano Ronaldo has always been marketed as someone who trains like a machine and lives like an elite athlete. The latest data from Whoop, the wearable company he partners with, adds a new chapter ...

Your heart rate can tell you a lot about your fitness and cardiovascular health. Your heart beats consistently, day in and day out, but you may not generally pay close attention to it. You might take ...

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 ...