New research on heart rate variability suggests that composure isn’t a personality trait. It’s a physiological skill the nervous system can train—one that may determine who thrives when the stakes are ...

In the United States, flu season typically lasts from October to May. The flu virus affects people of all ages each year, and symptoms include coughing, runny nose, fever, chills, body aches, and ...

Erectile dysfunction (ED) is the inability to get or keep an erection firm enough to have sexual intercourse. It’s sometimes referred to as “impotence,” but this term is now used less often. ED can ...