As concerns mount over the effect of extreme heat on our bodies, the lab’s work has grown. After a major expansion this ...

Cortisol is an important hormone that regulates blood pressure, sugar, and metabolism. Learn about blood, saliva, and urine tests conducted for cortisol.

There are several types of iron tests, some of which can be done at home or through a lab near you.

A doctor's visit often includes a stop at the lab for blood tests. But the last few years have brought changes to how some common lab tests are done.

Although a lab test has long been seen as the gold standard for measuring your VO2 max, experts now question whether we need to know this metric after all.

One lab said that your results might need to be interpreted differently. It was also pointed out that it depends on the test and on your vitamins or herbal products.

I got my VO2max tested in an exercise lab, and compared that number to the VO2max or cardio fitness scores from Apple, Coros, Fitbit, Garmin, Oura, Suunto, Ultrahuman, Withings, and Whoop devices ...