Oura reports that heart rate variability (HRV) measures the variation in heartbeat timing, reflecting stress levels and recovery. Higher HRV indicates well-being, while lower HRV signals stress.

This American Heart Month, cardiologist Dr. Nidal Ganim explains how smartwatches and rings can track your heart health and ...

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 ...

Personalizing overnight fasting by stopping food intake three hours before sleep improves blood pressure and blood sugar control without calorie counting.

Advances in wearables technology mean more recreational athletes are taking a data-driven approach to their training. Here ...

When one partner is stressed, the other feels it too—not just emotionally, but on a biological level. New research on heart rate synchronization helps explain how.

The best heart rate monitors will track your heart rate comfortably, consistently and accurately ...