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About the author: Tom Brown is the webmaster at Introduction There seems to be a lot of confusion and loose thinking about stress in popular journals and books. How else can you explain terms like ?good stress? and concepts like ?A certain amount of stress is good for you,? or advice like ?Stress is unavoidable.? Once you understand the meaning of stress you'll realize that stress is always harmful, that there is no 'safe? level of stress, and that you can deflect stress if you know how. Let's start by straightening out the definition of stress: stress is not a mental or emotional state Authentic Chiefs T-Shirts , and it's certainly not a moral or metaphysical issue. Stress is a physiological and medical condition, produced by prolonged feelings of insecurity and anxiety.
Physical and Mental Symptoms The Japanese word, ?karoshi? means, approximately, 'death by stress,? and it's a significant source of mortality among Japanese workers Authentic Chiefs Hoodie , especially middle-aged white collar men. Stress kills them either directly, by causing their bodies to break down, or indirectly, through depression and suicide. In either case, stress is bad news and it's no exaggeration to say that your life is at stake in a stressful situation. Chronic stress affects your heart and arteries, your digestive system Customized Chiefs Jerseys , your skin and hair, your immune system, and your brain and nervous system, and virtually every other organ in your body.
Stress is also implicated in a variety of mental health disorders, including depression, anxiety Elite Chiefs Jersey , burnout, substance abuse, workplace and domestic violence, and suicide. And although stress hasn't been shown to cause personality disorders like schizophrenia, it does complicate them and make them more difficult to treat.
Clearly, chronic stress is a major health problem Authentic Chiefs Jersey , and is nothing to take lightly. To put it bluntly, stress can kill you as surely as cancer.
Our Biological Inheritance If stress is so harmful, why in the world are we so susceptible to it? Wouldn't you think that evolution would have eliminated it? In a sense, stress was invented millions of years ago, long before we became human, as an adaptation to living in a dangerous world. To explain this paradox Darwin Thompson Big Tall Jersey , let's imagine one of our long-ago ancestors on the plains of Africa who suddenly looks up and sees a leopard on the branch over his head. In much less than half a second, without any conscious thought, his brain registers the picture of the leopard and classifies it as a life-threatening danger. Then the brain starts to mobilize the body either to run away or for defense.
Fight or Flight? When the brain perceives the leopard in the tree and decides that it is dangerous, it sends a signal to the adrenal glands, which sit on top of your kidneys. In response, the adrenal glands produce two hormones: first adrenaline and later cortisol. Adrenaline acts very quickly on almost every part of your body. Your heart begins to beat more quickly and strongly Khalen Saunders Big Tall Jersey , the small blood vessels in your skin contract (that's why you look ?white as a sheet? after you're scared), your stomach stops digesting food, and your vision narrows to a 'tunnel?. All of these changes make you, for a little while, stronger and quicker than you normally are - ready to run away from the leopard.
As you're running away from the leopard, the adrenal glands start to produce a hormone called cortisol. Cortisol acts to increase the amount of sugar in your blood for quick energy Juan Thornhill Big Tall Jersey , and if you have to flee for days and days without food, cortisol helps your body convert muscle and bone into energy. The combined effect of adrenaline and cortisol is to give us the energy we need to deal with dangerous situations - and that's why we evolved the fightflight response in the first place.