You track your VO2 max and working heart rate, but this underrated biometric may tell you more about your heart and long-term ...

From Apple Watches to Fitbits to treadmills, there are more ways than ever for people to keep up with their vitals. So why does so much fitness tech check your pulse? Because your resting heart rate ...

That little number on your fitness tracker might be more important than you realize. Your resting heart rate isn’t just some random vital sign. It’s essentially a window into how efficiently your ...

Smartwatch makers promise to turn your wrist into a sleep lab, translating tiny movements and heart rate blips into colorful ...

It’s a logical step, since scientists have learned that sleep plays a huge role in nearly every aspect of our wellbeing. It’s a logical step, since scientists have learned that sleep plays a huge role ...

Your heart rate naturally slows down before you conk out at night to shift your body into a rest and repair state. But everyone moves into this slower heart rate at different speeds, and there’s some ...

Inside the body, a 24-hour rhythm, known as the circadian rhythm, quietly coordinates when we sleep, wake, eat and recover.

New research shows that even a few drinks can disrupt your heart’s nighttime recovery, smartwatches reveal the hidden cardiovascular cost, even when your sleep patterns look normal. Study: The Impact ...