That's according to Duke University scientists who found that people who stayed angry throughout young adulthood into middle age   or who became grumpier over the years   were more likely to eat a high fat diet, avoid exercise, and be overweight. To find out if you're on the path to "mad fat", answer these questions we found in Prevention magazine:

1. Do you often find yourself annoyed at the incompetence of others?
2. Do little things, like traffic lights and long lines, get under your skin everyday?
3. If you do get angry, do you usually blast the person who made you angry? Like that guy who cut you off on the drive home?
If you answered yes to even one question, you may have the type of chronic anger that can torpedo your efforts to stay healthy. So what can you do? Follow the advice of doctor Redford Williams. He suggests evaporating your anger by asking yourself these 2 questions.

1. Is this really important? If not, distract yourself from the thing that's making you angry.
And the second question: Is it worth taking action to change the situation that's making me angry?
If it's not worth taking action, you have to accept the situation and move on. It's not only good for your mood, it's good for your body. Instead of having the "mad fats", you'll have the "happy thins".