Stress is part of our daily human experience, but it is associatedwithagreatvarietyofessentially dissimilarproblems,suchassurgicaltrauma,burns, emotionalarousal,mentalorphysicaleffort,fatigue,pain,fear,theneedforconcentration, thehumiliationof frustration,thelossof blood,intoxication withdrugsor environmental pollutants, or even the kind of unexpected success that requires an individual to reformulate his lifestyle