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

Stephen Pollard writes about how a high heart rate alert from his Apple Watch helped diagnose a potentially serious drug ...

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 ...

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

A lower resting heart rate indicates an efficient heart and a higher level of parasympathetic activity. When you’re at rest, your nervous system ideally minimizes sympathetic activity, so you’re ...

Stretchable MXene hydrogel sensor tracks heart rate and respiration during intense exercise, staying stable under heat, ...

Your heartbeat can provide valuable clues to help you stay well. Here’s what top cardiologists want you to know about it.

Looking for a heart rate monitor to help take your training to the next level? Here are some of our top ...

The first fitness tracker made by Renpho is durable and long-lasting, but its performance hiccups and utilitarian design ...

While Apple Watches cannot detect strokes or provide diagnoses, they can at times monitor your heart rate to detect an ...

Continuous monitoring of heart rate and breathing during intense physical activity is critical for early detection of cardiorespiratory risks, yet ...