The ability to move with speed, precision and power is important for longevity. Here’s how to gauge it and how to improve.

How old are you, really? People are flocking to so-called longevity clinics and buying tests online to find out their “biological age”—a metric that some scientists say could reveal how healthy a ...

Pulmonary function tests are a group of noninvasive breathing tests that measure how much air your lungs can hold, how quickly you can move air in and out and how efficiently your lungs transfer ...

Testosterone tests measure levels of testosterone in the blood. At-home test kits can be convenient, but they cannot diagnose underlying health conditions that cause high or low testosterone. Share on ...

Standardized tests reflect little of what you have learned. Rather, they reveal how well you test. Students who test well have advantages over those who have average or low test-taking ability. The ...