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Scientists had given their definition of stress based on research

Scientists had given their definition of stress based on research. One of the definition is the non-specific control of the body to any change made upon it (Selye, 1956). Stress also can be defined as practical and exciting situation in which a person face a requirement or complex demand and makes either an emotional, physical or cognitive reaction that can be constructive or destructive (Rass et al, 1997).
“Stress”, the word refers to a state of deviation or variation from general situation due to unplanned or improperly designed system or work process causes failures and cannot achieve the goals. A complete freedom from stress is death (Selye, 1974). Besides, Lazarus (2006) says stress as a phenomenon comprising all of those three aspects, involving a subjective view of psychological stress and underlines interplay in the environment and between people.
Besides above mentioned, definition, stress also allows us to be best and the body needs to react appropriately when experiencing a physical warning in order to continue alive. An acute experience of stressful situation is not harmful, but the long term stress can lead to be dangerous to one’s health (Beatty, 2001).
Stress results in a variety of physiological, psychological, and behavioural consequences (McShane ; Von Glinow, 2003). An individual’s physiological responses to stress include headaches, muscle pains, stomach ulcers, and others. Psychological symptoms of stress include anxiety, anger, moodiness, dissatisfaction, and the like. Finally, some of the behavioural consequences of stress include higher absenteeism, lower productivity, higher turnover, and workplace aggression.
According to Kyriacou & Sutcliffe (1978) stress as a negative emotional experience being triggered by the teacher’s perception that their work situation constituted a threat to their self-esteem or well-being. In addition, a number of researchers have focused on the notion of teacher burnout, which is seen to be a state of emotional, physical and attitudinal exhaustion which may develop in teachers who have been unsuccessful in coping effectively with stress in long period of time (Guglielmi ; Tatrow, 1998; Vandenberghe ; Huberman, 1999).