You might be familiar with HRV—heart rate variability—as a popular training tool for workouts and a biomarker for measuring exercise recovery. Beyond exercise tracking, heart rate variability has a ...

Older adults who sleep in bedrooms warmer than 75 degrees Fahrenheit face measurably higher odds of overnight cardiovascular strain, according to a study of 47 community-dwelling seniors tracked over ...

Wearable fitness trackers provide sleep data that can give you insights about the duration and quality of your sleep. A doctor explains which metrics matter the most, and how to use the data to ...

Fitness trackers and smart watches are widely popular wearable devices that measure several types of health metrics, including step count, calories burned, sleep quality, Vo2 max and heart rate. As a ...

Heart rate variability during sleep can predict stroke, depression or cognitive dysfunction years in advance, according to new research presented at the European Academy of Neurology Congress. The ...

Research shows links between a consistent sleep schedule and healthy cardiovascular markers like stable blood pressure and low HRV. Going to sleep at the same time each night may also boost your mood, ...

Oura reports that heart rate variability (HRV) measures the variation in heartbeat timing, reflecting stress levels and ...

Apple Watch users who wake up to inconsistent sleep data have a real problem: the device tracks sleep using optical ...

Plus, doctors’ number-one pick and their take on the devices.

Tracking key heart health metrics every day helps you understand how your lifestyle affects your cardiovascular system and empowers you to take proactive steps toward better heart health. Heart ...

Sleep scores in the morning. Heart rate variability after workouts. Steps before bed. The data had become a quiet hum ...