After a run, a woman checks her Apple Watch heart rate monitor to get an accurate reading.

How Accurate Is Your Apple Watch’s Heart Rate Monitor?

Learn about the surprising accuracy of the Apple Watch heart rate monitor. Discover how it uses innovative tech to help users stay heart-healthy.

What Are the Health Benefits of Walking 10,000 Steps a Day?

10,000 steps a day: hokum or helpful? Learn the surprising origins of this advice and whether there really are health benefits to walking 10,000 steps a day.

Two feet stand on a scale with a tape measure curled on the ground nearby, representing BMI vs. body composition.

BMI vs. Body Composition: What’s the Difference and Why Should You Care?

Discover the crucial differences between BMI vs. body composition, which provides more helpful data, and why it matters for your health.

A man holds his head in pain as he asks himself, “Why do I get headaches after naps?”

Why Do I Get Headaches After a Nap?

“Why do I get headaches after a nap?” Learn about sleep architecture, why naps aren’t always refreshing, and what you can do to wake up feeling better.

A bearded man lies in bed with insomnia, worrying about sleep’s effect on athletic performance.

What Is Sleep’s Effect on Athletic Performance?

Discover sleep’s effect on athletic performance, why it’s crucial to get enough rest, and three big ways a lack of sleep impacts you physically.

A Doctor’s 5-Step Guide to Athletic Performance After 50

You don’t have to abandon athleticism as you age. Learn how to pursue athletic performance and get into shape after 50 with these five tips.