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 ...

Postural orthostatic tachycardia syndrome (POTS) is a form of autonomic dysfunction. Your autonomic nervous system regulates involuntary functions such as breathing, heart rate, blood pressure, and ...

Understanding your heart rate is crucial for more than just reaching optimal fitness–it can also help to reduce injury and ...

It's healthy to know your numbers. Learn about resting and maximum heart rates, exercise targets, and when to consult a doctor about heartbeat irregularities.

POTS (Postural Orthostatic Tachycardia Syndrome) represents a mechanical failure of blood flow, distinct from standard heart ...