Stress (psychology)

In psychology, stress is a feeling of strain and pressure. Small amounts of stress may be desired, beneficial, and even healthy. Positive stress helps improve athletic performance. It also plays a factor in motivation, adaptation, and reaction to the environment. Excessive amounts of stress, however, may lead to bodily harm. Stress can increase the risk of strokes, heart attacks, ulcers, dwarfism, and mental illnesses such as depression.

Stress can be external and related to the environment, but may also be created by internal perceptions that cause an individual to experience anxiety or other negative emotions surrounding a situation, such as pressure, discomfort, etc., which they then deem stressful.

Humans experience stress, or perceive things as threatening, when they do not believe that their resources for coping with obstacles (stimuli, people, situations, etc.) are enough for what the circumstances demand. When we think the demands being placed on us exceed our ability to cope, we then perceive stress.

A very much overlooked side of stress is its positive adaptations. Positive psychological stress can lead to motivation and challenge instead of anxiety. The effects of experiencing eustress, which is positive stress, versus distress, which is negative stress, are significant. While colloquially lumped together, the various types of stress should be treated as separate concepts.

Selye proposed that there are four variations of stress. On one axis, there is good stress (eustress) and bad stress (distress). On the other is overstress (hyperstress) and understress (hypostress). The goal is to balance these as much as possible. The ultimate goal would be to balance hyperstress and hypostress perfectly and have as much eustress as possible. It is extremely useful for a productive lifestyle because it makes working enjoyable instead of a chore, as seen with distress.

Eustress comes from the Greek root “eu” which means good as in euphoria. Eustress is when a person perceives a stressor as positive. Distress stems from the Latin root “dis” as in dissonance or disagreement. Distress is a threat to the quality of life. It is when a demand vastly exceeds a person’s capabilities.

There is likely a connection between stress and illness. Theories of the stress–illness link suggest that both acute and chronic stress can cause illness, and several studies found such a link. According to these theories, both kinds of stress can lead to changes in behavior and in physiology. Behavioral changes can be smoking and eating habits and physical activity. Physiological changes can be changes in sympathetic activation or hypothalamic pituitary adrenocorticoid activation, and immunological function. However, there is much variability in the link between stress and illness.

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