Hardcore endurance athletes have tracked the metric for decades, but it is increasingly touted as a measure of fitness and health for the average person.

Six-pack abs don't always show a picture of health. But getting a read on the maximum oxygen your body takes in while exercising can be key for long-sustaining health. The technology to test oxygen ...

For decades, it was impossible for clinicians to know which babies with major heart defects might eventually have developmental abnormalities, like ADHD and learning differences. Now, by adapting a ...