Think having it all calm and cool makes you The Dude but turns out researchers from the University of Birmingham have collected health data of over 1,300 people over a 14 year period that shows people who remain calm in stressful situations are more prone to depression and obesity, adding the poorer overall health.
They gave each a stress test to determine if their blood pressure and heart rate respond to stressful situations, and the more calm a person's vital signs showed, the more likely they were to develop depression and obesity over the next five years.
That being said, I don't believe this sample size is enough to come to a conclusion that being calm makes you more prone to health risk and overall poorer health. So what's the remedy? Blow and flip out everytime you're stressed out?