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Occupational stress is a broad concept that has been defined in a variety of ways in the popular and professional literature. It is generally agreed that occupational stress consists of the harmful physical and psychological consequences to individuals that result when an imbalance exists between demands of the work environment and individual needs, abilities, and resources. Most people experience some level of occupational stress on occasion, and it is generally believed that such short-lived, episodic experiences do not pose serious or lasting harm to the individual. However, when a significant level of occupational stress persists for an extended period of time, potentially serious physical and psychological harm may occur. Although occupational stress is most often considered to be undesirable, the notion of good stress, also referred to as eustress, has been used to describe stress that motivates and energizes the worker to learn new skills and perform more effectively, without the debilitating impact typically associated with occupational stress. In the case of good stress, the result of having successfully mastered the challenge posed by the stressful condition is a sense of personal satisfaction and achievement.

Occupational stress in the American workplace is widespread and appears to be growing. When asked about primary sources of stress in their lives, a substantial number of people point to conditions in their work environments such as long hours, workload, poor communication, management problems, and lack of support, to name several examples. Recent surveys of workers suggest that as many as 80% of workers experience stress in their work, and 40% of respondents find their work to be very or extremely stressful. Occupational stress poses a very real threat to the quality of life for employees within an organization as well as a serious threat to the productivity and profitability of the organization itself.

Individual and Organizational Perspectives

Efforts to explore the origin of occupational stress have approached the question from the perspectives of both the individual and the workplace environment. Obviously, characteristics of the individual and the work environment interact to produce the various individual and organizational outcomes observed in studies of occupational stress.

Individual Perspective

When individuals experience stress, the brain mobilizes the body's systems for defensive action in what is commonly known as the fight-or-flight response. This response is characterized by an increase in various bodily hormones that stimulate an increase in several vital functions such as heart rate, respiration, blood pressure, and muscle tension. This fight-or-flight response plays a key role in humans' ability to protect themselves when in potentially dangerous situations, either by fleeing or fighting. However, if the stressful situation persists unresolved, the prolonged arousal of vital functions may eventually deplete the body's resources, contributing to injury or disease.

Symptoms

According to the National Institute for Occupational Safety and Health (NIOSH), a federal agency responsible for research and policy on matters of work-related illness and injury, several symptoms have been identified as early warning signs of occupational stress. These symptoms may include headaches, difficulty concentrating, sleep disturbances, upset stomach, mood disturbances, job dissatisfaction, and disturbed relationships. These early warning signs are fairly easy to recognize. Of greater concern, however, is the fact that prolonged occupational stress can contribute, in concert with other factors, to more serious physical and mental health problems that are chronic in nature and potentially life threatening. NIOSH has identified three broad categories of health problems believed to be associated with prolonged stress that include cardiovascular disease (e.g., heart disease, high blood pressure), musculoskeletal disorders (e.g., tendonitis, lower back pain), and psychological disorders (e.g., anxiety, depression).

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