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It is the body’s response to physical and psychological demands. The body reacts to stress by increasing the blood sugar and blood pressure, heart rate, and breathing.

Some types of examples that can cause stress are; physical stress such as noise or vibration, physiological like fatigue, and work or personal stress.

Acute Stress:

Acute stress is short term, it is an immediate threat, it triggers a “fight or flight” in individuals.

Chronic Stress:

Chronic stress is long term stress, it is a level of stress that presents a burden, and exceeds the ability for an individual to cope with, causing his or her performance to fall sharply.


Fatigue is becoming more frequent in aviation, mainly pilots. Some of the effects of fatigue are degradation of attention and concentration, impaired coordination and lack of communication.

Fatigue is very similar to stress by having two categories.

Acute fatigue:

Acute fatigue is also short term and is the type of fatigue that people face in everyday life, such as after a period of strenuous effort, excitement, or just lack of sleep.

Chronic fatigue:

Chronic fatigue is the type that last for an extended period of time. Continues high-stress levels are a cause of this type of fatigue.


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