Your watch’s VO2 max isn’t perfect, but you can improve its accuracy with better data and heart-rate tracking.

When you think about monitoring heart and breathing rates, you likely picture a wearable device—a wristband, chest strap, or ...

Two minutes. That's how long two-year-old Briar Curtis's heart stopped during a severe seizure in April 2025. Since birth and before, Briar had been sick. Her heart rate in the womb was high and ...

Health trackers like Apple Watches and Oura Rings already do a fine job at providing insights into health patterns and trends. But sometimes, software comes along that offers a little something else ...