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Hans Selye defined stress as “the nonspecific (that is, common) result of any demand upon the body, be the effect mental or somatic.” [5] This includes the medical definition of stress as a physical demand and the colloquial definition of stress as a psychological demand. A stressor is inherently neutral meaning that the same stressor can ...
However, the problem arises when there is a persistent threat. First-time exposure to a stressor will trigger an acute stress response in the body; however, repeated and continuous exposure causes the stressor to become chronic. [4] McEwen and Stellar (1993) argued there is a "hidden cost of chronic stress to the body over long time periods". [8]
Transgenerational stress in humans, as in animal models, induces effects influencing social behavior, reproductive success, cognitive ability, and stress response. [3] Similar to animal models, human studies have investigated the role of epigenetics and transgenerational inheritance molecularly as it relates to the HPA system.
The reaction of these systems causes a number of physical changes that have both short- and long-term effects on the body. [24] The Holmes and Rahe stress scale was developed as a method of assessing the risk of disease from life changes. [25] The scale lists both positive and negative changes that elicit stress.
Stress can be understood as the body’s response to big life events and perceived threats or danger. There are various types of stress, a wide range of symptoms, and numerous resulting impacts on ...
Stress is the leading cause of mental and physical problems, [citation needed] therefore feeling relaxed is often beneficial for a person's health. When a person is highly stressed, the sympathetic nervous system is activated because one is in a fight-or-flight response mode; over time, this could have negative effects on a human body.
Excessive stress and sleep deprivation can cause cardiovascular issues, such as high blood pressure and heart disease. In a study focusing on the impacts of chronic stress on the heart, it was found that during times of chronic stress, the body hyperactivates the sympathetic nervous system which leads to changes in heart rate variability. [22]
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