Carley is a writer, editor and social media professional. Before starting at Forbes Health, she wrote for Sleepopolis and interned at PBS and Nickelodeon. She's a certified sleep science coach and ...

The human heart works quietly in the background, beating around 100,000 times a day. Most people notice it only during exercise, stress, or illness. Yet doctors say one simple number, the resting ...

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.