Psychological stress

In psychology, stress is a feeling of emotional strain and pressure.[1] Stress is a type of psychological pain. 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, and mental illnesses such as depression[2] and also aggravation of a pre-existing condition.

Psychological stress
A man expressing stress

Stress can be external and related to the environment,[3] but may also be caused 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.

Hans Selye (1974) proposed four variations of stress.[4] On one axis he locates good stress (eustress) and bad stress (distress). On the other is over-stress (hyperstress) and understress (hypostress). Selye advocates balancing these: the ultimate goal would be to balance hyperstress and hypostress perfectly and have as much eustress as possible.[5]

The term "eustress" comes from the Greek root eu- which means "good" (as in "euphoria").[6] Eustress results when a person perceives a stressor as positive.[7] "Distress" stems from the Latin root dis- (as in "dissonance" or "disagreement").[6] Medically defined distress is a threat to the quality of life. It occurs when a demand vastly exceeds a person's capabilities.[7] Stress may cause headache.[8]

Causes

Neutrality of stressors

Stress is a non-specific response.[5] It is neutral, and what varies is the degree of response. It is all about the context of the individual and how they perceive the situation. 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 cause either distress or eustress. It is individual differences and responses that induce either distress or eustress.[9]

Types of stressors

A stressor is any event, experience, or environmental stimulus that causes stress in an individual.[10] These events or experiences are perceived as threats or challenges to the individual and can be either physical or psychological. Researchers have found that stressors can make individuals more prone to both physical and psychological problems, including heart disease and anxiety.[11]

Stressors are more likely to affect an individual's health when they are "chronic, highly disruptive, or perceived as uncontrollable".[11] In psychology, researchers generally classify the different types of stressors into four categories: 1) crises/catastrophes, 2) major life events, 3) daily hassles/microstressors, and 4) ambient stressors. According to Ursin (1988), the common factor between these categories is an inconsistency between expected events ("set value") and perceived events ("actual value") that cannot be resolved satisfactorily,[12] which puts stress into the broader context of cognitive-consistency theory.[13]

Crises/catastrophes

This type of stressor is unforeseen and unpredictable and, as such, is completely out of the control of the individual.[11] Examples of crises and catastrophes include: devastating natural disasters, such as major floods or earthquakes, wars, pandemics, etc. Though rare in occurrence, this type of stressor typically causes a great deal of stress in a person's life. A study conducted by Stanford University found that after natural disasters, those affected experienced a significant increase in stress level.[11] Combat stress is a widespread acute and chronic problem. With the rapid pace and the urgency of firing first, tragic episodes of accidentally killing friendly forces (“brother” killing “brother” or fratricide) may happen. Prevention requires stress reduction, emphasis on vehicle and other identification training, awareness of the tactical situation, and continual risk analysis by leaders at all echelons.[14]

Major life events

Common examples of major life events include: marriage, going to college, death of a loved one, birth of a child, divorce, moving houses, etc. These events, either positive or negative, can create a sense of uncertainty and fear, which will ultimately lead to stress. For instance, research has found the elevation of stress during the transition from high school to university, with college freshmen being about two times more likely to be stressed than final year students.[15] Research has found major life events are somewhat rare to be major causes of stress, due to its rare occurrences.[11]

The length of time since occurrence and whether or not it is a positive or negative event are factors in whether or not it causes stress and how much stress it causes. Researchers have found that events that have occurred within the past month generally are not linked to stress or illness, while chronic events that occurred more than several months ago are linked to stress and illness[16] and personality change.[17] Additionally, positive life events are typically not linked to stress – and if so, generally only trivial stress – while negative life events can be linked to stress and the health problems that accompany it.[11] However, positive experiences and positive life changes can predict decreases in neuroticism.[17][18]

Daily hassles/microstressors

This category includes daily annoyances and minor hassles.[11] Examples include: making decisions, meeting deadlines at work or school, traffic jams, encounters with irritating personalities, etc. Often, this type of stressor includes conflicts with other people. Daily stressors, however, are different for each individual, as not everyone perceives a certain event as stressful. For example, most people find public speaking to be stressful, nevertheless, a seasoned politician most likely will not.

Daily hassles are the most frequently occurring type of stressor in most adults. The high frequency of hassles causes this stressor to have the most physiological effect on an individual. Carolyn Aldwin, Ph.D., conducted a study at the Oregon State University that examined the perceived intensity of daily hassles on an individual's mortality. Aldwin's study concluded that there is a strong correlation between individuals who rate their hassles as very intense and a high level of mortality. One's perception of their daily stressors can have a modulating effect on the physiological impact of daily stressors.[19]

There are three major psychological types of conflicts that can cause stress.

• The approach-approach conflict, occurs when a person is choosing between two equally attractive options, i.e. whether to go see a movie or to go see a concert.[11]
• The avoidance-avoidance conflict, occurs where a person has to choose between two equally unattractive options, for example, to take out a second loan with unappealing terms to pay off the mortgage or to face foreclosure on one's house.[11]
• The approach-avoidance conflict,[11] occurs when a person is forced to choose whether or not to partake in something that has both attractive and unattractive traits – such as whether or not to attend an expensive college (meaning taking out loans now, but also meaning a quality education and employment after graduation).

Travel-related stress results from three main categories: lost time, surprises (an unforeseen event such as lost or delayed baggage) and routine breakers (inability to maintain daily habits).[20]

Ambient stressors

As their name implies, these are global (as opposed to individual) low-grade stressors that are a part of the background environment. They are defined as stressors that are "chronic, negatively valued, non-urgent, physically perceptible, and intractable to the efforts of individuals to change them".[21] Typical examples of ambient stressors are pollution, noise, crowding, and traffic. Unlike the other three types of stressor, ambient stressors can (but do not necessarily have to) negatively impact stress without conscious awareness. They are thus low on what Stokols called "perceptual salience".[21]

Organisational stressors

Studies conducted in military and combat fields show that some of the most potent stressors can be due to personal organisational problems in the unit or on the home front.[22] Stress due to bad organisational practices is often connected to "Toxic Leadership", both in companies and in governmental organisations.[23]

Stressor impact

Life events scales can be used to assess stressful things that people experience in their lives. One such scale is the Holmes and Rahe Stress Scale, also known as the Social Readjustment Rating Scale, or SRRS.[24] Developed by psychiatrists Thomas Holmes and Richard Rahe in 1967, the scale lists 43 stressful events.

To calculate one's score, add up the number of "life change units" if an event occurred in the past year. A score of more than 300 means that individual is at risk for illness, a score between 150 and 299 means risk of illness is moderate, and a score under 150 means that individual only has a slight risk of illness.[11][24]

Life event	Life change units
Death of a spouse	100
Divorce	73
Marital separation	65
Imprisonment	63
Death of a close family member	63
Personal injury or illness	53
Marriage	50
Dismissal from work	47
Marital reconciliation	45
Retirement	45
Change in health of family member	44
Pregnancy	40
Sexual difficulties	39
Gain a new family member	39
Business readjustment	39
Change in financial state	38
Death of a close friend	37
Change to different line of work	36
Change in frequency of arguments	35
Major mortgage	32
Foreclosure of mortgage or loan	30
Change in responsibilities at work	29
Child leaving home	29
Trouble with in-laws	29
Outstanding personal achievement	28
Spouse starts or stops work	26
Begin or end school	26
Change in living conditions	25
Revision of personal habits	24
Trouble with boss	23
Change in working hours or conditions	20
Change in residence	20
Change in schools	20
Change in recreation	19
Change in church activities	19
Change in social activities	18
Minor mortgage or loan	17
Change in sleeping habits	16
Change in number of family reunions	15
Change in eating habits	14
Vacation	13
Minor violation of law	10

A modified version was made for non-adults. The scale is below.[11]

Life event	Life change units
Unwed pregnancy	100
Death of parent	100
Getting married	95
Divorce of parents	90
Acquiring a visible deformity	80
Fathering an unwed pregnancy	70
Jail sentence of parent for over one year	70
Marital separation of parents	69
Death of a brother or sister	68
Change in acceptance by peers	67
Pregnancy of unwed sister	64
Discovery of being an adopted child	63
Marriage of parent to stepparent	63
Death of a close friend	63
Having a visible congenital deformity	62
Serious illness requiring hospitalization	58
Failure of a grade in school	56
Not making an extracurricular activity	55
Hospitalization of a parent	55
Jail sentence of parent for over 30 days	53
Breaking up with boyfriend or girlfriend	53
Beginning to date	51
Suspension from school	50
Becoming involved with drugs or alcohol	50
Birth of a brother or sister	50
Increase in arguments between parents	47
Loss of job by parent	46
Outstanding personal achievement	46
Change in parent's financial status	45
Accepted at college of choice	43
Being a senior in high school	42
Hospitalization of a sibling	41
Increased absence of parent from home	38
Brother or sister leaving home	37
Addition of third adult to family	34
Becoming a full-fledged member of a church	31
Decrease in arguments between parents	27
Decrease in arguments with parents	26
Mother or father beginning work	26

The SRRS is used in psychiatry to weight the impact of life events.[25]

Measurement

Modern humans may attempt to self-assess their own "stress-level"; third parties (sometimes clinicians) may also provide qualitative evaluations. Quantitative approaches giving results which may correlate with perceived psychological stress include testing for one or more of the several stress hormones,[26] for cardiovascular responses,[27] or for immune response.[28]

Physical effects

The body responds to stress in many ways. Readjusting chemical levels is just one of them. This section includes some examples of adjustments and changes.

To measure the body's response to stress, psychologists tend to use Hans Selye's general adaptation syndrome. This biological model, often referred to as the "classic stress response", revolves around the concept of homeostasis. General adaptive syndrome, according to this system, occurs in three stages:

1. The alarm reaction. This stage occurs when the stressor is first presented. The body begins to gather resources to deal with the stressor. The hypothalamic-pituitary-adrenal axis and sympathetic nervous system are activated, resulting in the release of hormones from the adrenal gland such as cortisol, adrenaline (epinephrine), and norepinephrine into the bloodstream to adjust bodily processes. These hormonal adjustments increase energy-levels, increase muscle tension, reduce sensitivity to pain, slow down the digestive system, and cause a rise in blood pressure.[29][30] In addition, the locus coeruleus, a collection of norepinephrine-containing neurons in the pons of the brainstem whose axons project to various regions of the brain, is involved in releasing norepinephrine directly onto neurons. High levels of norepinephrine acting as a neurotransmitter on its receptors expressed on neurons in brain regions, such as the prefrontal cortex, are thought to be involved in the effects of stress on executive functions, such as impaired working memory.
2. The stage of resistance. The body continues building up resistance throughout the stage of resistance, either until the body's resources are depleted, leading to the exhaustion phase, or until the stressful stimulus is removed. As the body uses up more and more of its resources, it becomes increasingly tired and susceptible to illness. At this stage psychosomatic disorders first begin to appear.[30]
3. The stage of exhaustion. The body is completely drained of the hormones and resources it was depending on to manage the stressor. The person now begins to exhibit behaviors such as anxiety, irritability, avoidance of responsibilities and relationships, self-destructive behavior, and poor judgment. Someone experiencing these symptoms has a much greater chance of lashing out, damaging relationships, or avoiding social interaction at all.[30]

This physiological stress response involves high levels of sympathetic nervous system activation, often referred to as the "fight or flight" response. The response involves pupil dilation, release of endorphins, increased heart and respiration rates, cessation of digestive processes, secretion of adrenaline, arteriole dilation, and constriction of veins. This high level of arousal is often unnecessary to adequately cope with micro-stressors and daily hassles; yet, this is the response-pattern seen in humans, which often leads to health issues commonly associated with high levels of stress.[31]

Cancer

Evidence for a link between stress and cancer is unclear as of 2019.[32] This can be due to practical difficulties in designing and implementing adequate studies.[33] Research has found that personal belief in stress as a risk factor for cancer was common in England, though awareness of risk factors overall was found to be low.[34]

Sleep

Sleep allows people to rest and re-energise for another day potentially filled with interactions and tasks. If someone is stressed it is extremely important for them to get enough sleep so that they can think clearly. However, chemical changes in the body caused by stress can make sleep a difficult thing. The body releases glucocorticoids in response to stress; this can disrupt sleep.[35]

Other effects

A stressed woman waiting in line at a medical centre

There is likely a connection between stress and illness.[36] Theories of a proposed stress–illness link suggest that both acute and chronic stress can cause illness, and studies have found such a link.[37] According to these theories, both kinds of stress can lead to changes in behavior and in physiology. Behavioral changes can involve smoking- and eating-habits and physical activity. Physiological changes can be changes in sympathetic activation or hypothalamic pituitary adrenocorticoid activation, and immunological function.[38] However, there is much variability in the link between stress and illness.[39]

Stress can make the individual more susceptible to physical illnesses like the common cold.[40] Stressful events, such as job changes, correlate with insomnia, impaired sleeping, and health complaints.[41] Research indicates the type of stressor (whether it is acute or chronic) and individual characteristics such as age and physical well-being before the onset of the stressor can combine to determine the effect of stress on an individual.[42] An individual's personality characteristics (such as level of neuroticism),[17] genetics, and childhood experiences with major stressors and traumas[18] may also dictate their response to stressors.[42]

Chronic stress and a lack of coping resources available or used by an individual can often lead to the development of psychological issues such as depression and anxiety (see below for further information).[43] This is particularly true regarding chronic stressors. These are stressors that may not be as intense as an acute stressor like a natural disaster or a major accident, but they persist over longer periods of time. These types of stressors tend to have a more negative impact on health because they are sustained and thus require the body's physiological response to occur daily. This depletes the body's energy more quickly and usually occurs over long periods of time, especially when such microstressors cannot be avoided (for example: stress related to living in a dangerous neighborhood). See allostatic load for further discussion of the biological process by which chronic stress may affect the body. For example, studies have found that caregivers, particularly those of dementia patients, have higher levels of depression and slightly worse physical health than non-caregivers.[44]

Studies have also shown that perceived chronic stress and the hostility associated with Type A personalities are often correlate with much higher risks of cardiovascular disease. This occurs because of the compromised immune system as well as the high levels of arousal in the sympathetic nervous system that occur as part of the body's physiological response to stressful events.[45] However, it is possible for individuals to exhibit hardiness – a term referring to the ability to be both chronically stressed and healthy.[46] Chronic stress can correlate with psychological disorders such as delusions.[47] Pathological anxiety and chronic stress lead to structural degeneration and impaired functioning of the hippocampus.[48]

It has long been believed that negative affective states, such as feelings of anxiety and depression, could influence the pathogenesis of physical disease, which in turn, have direct effects on biological process that could result in increased risk of disease in the end. However, studies done by the University of Wisconsin-Madison and other places have shown this to be partly untrue; although perceived stress seems to increase the risk of reported poor health, the additional perception of stress as something harmful increases the risk even further.[49][50] For example, when humans are under chronic stress, permanent changes in their physiological, emotional, and behavioral responses are most likely to occur.[17][33] Such changes could lead to disease. Chronic stress results from stressful events that persist over a relatively long period of time, such as caring for a spouse with dementia, or results from brief focal events that continue to be experienced as overwhelming even long after they are over, such as experiencing a sexual assault.

Experiments show that when healthy human individuals are exposed to acute laboratory stressors, they show an adaptive enhancement of some markers of natural immunity but a general suppression of functions of specific immunity. By comparison, when healthy human individuals are exposed to real-life chronic stress, this stress is associated with a biphasic immune response where partial suppression of cellular and humoral function coincides with low-grade, nonspecific inflammation.[51]

Even though psychological stress is often connected with illness or disease, most healthy individuals can still remain disease-free after confronting chronic stressful events. Also, people who do not believe that stress will affect their health do not have an increased risk of illness, disease, or death.[50] This suggests that there are individual differences in vulnerability to the potential pathogenic effects of stress; individual differences in vulnerability arise due to both genetic and psychological factors. In addition, the age at which the stress is experienced can dictate its effect on health. Research suggests chronic stress at a young age can have lifelong impacts on the biological, psychological, and behavioral responses to stress later in life.[52]

Social impact

Communication

When someone is stressed, many challenges can arise; a recognized challenge being communication difficulties. Here are some examples of how stress can hinder communication.

The cultures of the world generally fall into two categories; individualistic and collectivistic.[53]

• An individualistic culture, like that of the United States, where everyone is an independent entity defined by their accomplishments and goals.
• A collectivistic culture, like that of many Asian countries, prefers to see individuals as interdependent on each other. They value modesty and family.

These cultural differences can affect how people communicate when they are stressed. For example, a member of an individualistic culture would be hesitant to ask for pain medication for fear of being perceived as weak. A member of a collectivistic culture would not hesitate. They have been brought up in a culture where everyone helps each other and is one functional unit whereas the member of the individualistic culture is not as comfortable asking others for aid.[53]

Language barriers

Language barriers can cause stress by making people feel uncomfortable because differences in syntax, vocabulary, different ways of showing respect, and different use of body language can make things difficult, and along with a desire for successful social interactions, being uncomfortable with the communication around a person can discourage them from communicating at all.

The System 1 – System 2 model of Daniel Kahneman (Thinking Fast and Slow) and others would distinguish between automatic responses, such as one's native language would be, and a foreign language that required System 2 work to translate. System 2 can become "depleted" by conscious mental effort, making it more difficult and stressful.[54]

Changes in the home

Divorce, death, and remarriage are all disruptive events in a household.[53] Although everyone involved is affected by events such as these, it can be most drastically seen in children. Due to their age, children have relatively undeveloped coping skills.[55] For this reason a stressful event may cause some changes in their behavior. Falling in with a new crowd, developing some new and sometimes undesirable habits are just some of the changes stress may trigger in their lives.[53]

A particularly interesting response to stress is talking to an imaginary friend. A child may feel angry with a parent or their peers who they feel brought this change on them. They need someone to talk to but it definitely would not be the person with whom they are angry. That is when the imaginary friend comes in. They “talk” to this imaginary friend but in doing so they cut off communication with the real people around them.[53]

Social support and health

Researchers have long been interested in how an individual's level and types of social support impact the effect of stress on their health. Studies consistently show that social support can protect against physical and mental consequences of stress.[56][57] This can occur through a variety of mechanisms. One model, known as the "direct effects" model, holds that social support has a direct, positive impact on health by increasing positive affect, promoting adaptive health behaviors, predictability and stability in life, and safeguarding against social, legal, and economic concerns that could negatively impact health. Another model, the "buffering effect", says that social support exerts greatest influence on health in times of stress, either by helping individuals appraise situations in less threatening manners or coping with the actual stress. Researchers have found evidence to support both these pathways.[58]

Social support is defined more specifically as psychological and material resources provided by a social network that are aimed at helping an individual cope with stress.[59] Researchers generally distinguish among several types of social support: instrumental support – which refers to material aid (e.g., financial support or assistance in transportation to a physician's appointment), informational support (e.g., knowledge, education or advice in problem-solving), and emotional support (e.g., empathy, reassurance, etc.).[59] Social support can reduce the rate of stress during pregnancy.

Management

Stress management refers to a wide spectrum of techniques and psychotherapies aimed at controlling a person's levels of stress, especially chronic stress, usually for the purpose of improving everyday functioning. It involves controlling and reducing the tension that occurs in stressful situations by making emotional and physical changes.

Prevention and resilience building

Decreasing stressful behaviors is a part of prevention. Some of the common strategies and techniques are: self-monitoring, tailoring, material reinforcement, social reinforcement, social support, self-contracting, contracting with significant other, shaping, reminders, self-help groups, and professional help.[60]

Although many techniques have traditionally been developed to deal with the consequences of stress, considerable research has also been conducted on the prevention of stress, a subject closely related to psychological resilience-building. A number of self-help approaches to stress-prevention and resilience-building have been developed, drawing mainly on the theory and practice of cognitive-behavioral therapy.[61]

Biofeedback may also play a role in stress management. A randomized study by Sutarto et al. assessed the effect of resonant breathing biofeedback (recognize and control involuntary heart rate variability) among manufacturing operators; depression, anxiety and stress significantly decreased.[62]

Exercising to reduce stress

Studies have shown that exercise reduces stress.[63] Exercise effectively reduces fatigue, improves sleep, enhances overall cognitive function such as alertness and concentration, decreases overall levels of tension, and improves self-esteem.[63] Because many of these are depleted when an individual experiences chronic stress, exercise provides an ideal coping mechanism. Despite popular belief, it is not necessary for exercise to be routine or intense in order to reduce stress; as little as five minutes of aerobic exercise can begin to stimulate anti-anxiety effects.[63] Further, a 10-minute walk may have the same psychological benefits as a 45-minute workout, reinforcing the assertion that exercise in any amount or intensity will reduce stress.[63]

Theoretical explanations

A multitude of theories have been presented in attempts to explain why exercise effectively reduces stress. One theory, known as the time-out hypothesis, claims that exercise provides distraction from the stressor. The time out hypothesis claims that exercise effectively reduces stress because it gives individuals a break from their stressors. This was tested in a recent study of college women who had identified studying as their primary stressor.[64] The women were then placed under four conditions at varying times: "rest," "studying," "exercising," and "studying while exercising." The stress levels of the participants were measured through self-assessments of stress and anxiety symptoms after each condition. The results demonstrated that the "exercise" condition had the most significant reduction in stress and anxiety symptoms.[64] These results demonstrate the validity of the time-out hypothesis.[64] It is also important to note that exercise provided greater stress reduction than rest.

Coping mechanisms

The Lazarus and Folkman model suggests that external events create a form of pressure to achieve, engage in, or experience a stressful situation. Stress is not the external event itself, but rather an interpretation and response to the potential threat; this is when the coping process begins.[65]

There are various ways individuals deal with perceived threats that may be stressful. However, people have a tendency to respond to threats with a predominant coping style, in which they dismiss feelings, or manipulate the stressful situation.[65]

There are different classifications for coping, or defense mechanisms, however they all are variations on the same general idea: There are good/productive and negative/counterproductive ways to handle stress. Because stress is perceived, the following mechanisms do not necessarily deal with the actual situation that is causing an individual stress. However, they may be considered coping mechanisms if they allow the individual to cope better with the negative feelings/anxiety that they are experiencing due to the perceived stressful situation, as opposed to actually fixing the concrete obstacle causing the stress. The following mechanisms are adapted from the DSM-IV Adaptive Functioning Scale, APA, 1994.

Highly adaptive/active/problem-focused mechanisms

These skills are what one could call as “facing the problem head on”, or at least dealing with the negative emotions experienced by stress in a constructive manner. (generally adaptive)

• Affiliation ("tend and befriend") – involves dealing with stress by turning to a social network for support, but an individual does not share with others in order to diffuse or avoid the responsibility.[66][67]
• Humour – the individual steps outside of a situation in order to gain greater perspective, and also to highlight any comic aspect to be found in their stressful circumstances.[66]

Coping through laughter

“The Association for Applied and Therapeutic Humour defines therapeutic humour as ‘any intervention that promotes health and wellness by stimulating a playful discovery, expression or appreciation of the absurdity of or incongruity of life’s situations. This intervention may enhance health or be used as a complementary treatment of illness to facilitate healing or coping whether physical, emotional, cognitive, or spiritual”.[68]

Sigmund Freud, a well known neurologist, suggests the humour was an excellent defensive strategy in emotional situations.[65] When one laughs during a tough situation they feel absent from their worries, and this allows them to think differently.[68] When one experiences a different mind set, they feel more in control of their response, and how they would go about dealing with the event that caused stress.

Lefcourt (2001) suggests that this perspective-taking humour is the most effective due to its ability to distance oneself from the situation of great stress.[69] Studies show that the use of laughter and humour creates a sense of relief of stress that can last up to 45 minutes post-laughter.[68]

Also, most hospitalized children have been seen to use laughter and play to relieve their fear, pain and stress. It has been discovered that there is a great importance in the use of laughter and humour in stress coping.[68] Humans should use humour as a means to transcend their original understanding of an external event, take a different perspective, in which their anxiety may be minimized by.

• Sublimation – allows an "indirect resolution of conflict with neither adverse consequences nor consequences marked by loss of pleasure."[70] Essentially, this mechanism allows channeling of troubling emotions or impulses into an outlet that is socially acceptable.
• Positive reappraisal – redirects thoughts (cognitive energy) to good things that are either occurring or have not occurred. This can lead to personal growth, self-reflection, and awareness of the power/benefits of one's efforts.[71] For example, studies on veterans of war or peacekeeping operations indicate that persons who construe a positive meaning from their combat or threat experiences tend to adjust better than those who do not.[72]

The final path model fitted well (CF1 = 1, RMSEA = 0.00) and showed that direct quality of life paths with β = -0.2, and indirect social support with β = -0.088 had the most effects on reduction of stress during pregnancy. Other adaptive coping mechanisms include anticipation, altruism, and self-observation.

Mental inhibition/disavowal mechanisms

These mechanisms cause the individual to have a diminished (or in some cases non-existent) awareness about their anxiety, threatening ideas, fears, etc., that come from being conscious of the perceived threat.

• Displacement – This is when an individual redirects their emotional feelings about one situation to another, less threatening one.[73]
• Repression – Repression occurs when an individual attempts to remove all their thoughts, feelings, and anything related to the upsetting/stressful (perceived) threat out of their awareness in order to be disconnected from the entire situation. When done long enough in a successful way, this is more than just denial.
• Reaction formation – An attempt to remove any “unacceptable thoughts” from one's consciousness by replacing them with the exact opposite.[74]

Other inhibition coping mechanisms include undoing, dissociation, denial, projection, and rationalization. Although some people claim that inhibition coping mechanisms may eventually increase the stress level because the problem is not solved, detaching from the stressor can sometimes help people to temporarily release the stress and become more prepared to deal with problems later on.

Active mechanisms

These methods deal with stress by an individual literally taking action, or withdrawing.

• Acting out – Often viewed as counter-normative, or problematic behavior. Instead of reflecting or problem-solving, an individual takes maladaptive action.[67]
• Passive aggression – When an individual indirectly deals with their anxiety and negative thoughts/feelings stemming from their stress by acting in a hostile or resentful manner towards others. Help-Rejecting Complaining can also be included in this category.

Health promotion

There is an alternative method to coping with stress, in which one works to minimize their anxiety and stress in a preventative manner. If one works towards coping with stress daily, the feeling of stress and the ways in which one deals with it as the external event arises becomes less of a burden.

Suggested strategies to improve stress management include:[75]

1. Regular exercise – set up a fitness program, 3–4 times a week
2. Support systems – to listen, offer advice, and support each other
3. Time management – develop an organizational system
4. Guided imagery and visualization – create a relaxing state of mind
5. Progressive muscle relaxation – loosen tense muscle groups
6. Assertiveness training – work on effective communication
7. Journal writing – express true emotion, self-reflection
8. Stress management in the workplace – organize a new system, switch tasks to reduce own stress.

Depending on the situation, all of these coping mechanisms may be adaptive, or maladaptive.

History

Prior to the introduction of the concept "stress" in the psychological sense c. 1955,[76][77] people already identified a range of more nuanced ideas to describe and confront such emotions as worry, grief, concern,[78] obsession, fear, annoyance, anxiety, distress, suffering and passion.[79] "Stress" has subsequently become a mainstay of pop psychology.[80][81]

See also

• Acute stress reaction
• Adaptive performance
• Chronic stress
• Cognitive behavioral therapy
• Cognitive dissonance
• Complex post-traumatic stress disorder
• Conservation of resources theory, stress theory
• Henry Murray extreme stress experiments at Harvard 1960´s
• Incident stress
• Invisible support
• Maladaptation
• Mental breakdown
• Mindfulness-based stress reduction
• Occupational stress
• Occupational burnout
• Posttraumatic stress disorder
• Psychological trauma
• Psychoneuroimmunology
• Stress (biological)

References

1. "Stress". Mental Health America. 2013-11-18. Retrieved 2018-10-01.
2. Sapolsky, Robert M. (2004). Why Zebras Don't Get Ulcers. 175 Fifth Ave, New York, N.Y.: St. Martins Press. pp. 37, 71, 92, 271. ISBN 978-0-8050-7369-0.CS1 maint: location (link)
3. Fiona Jones, Jim Bright, Angela Clow, Stress: myth, theory, and research Archived 2018-05-08 at the Wayback Machine, Pearson Education, 2001, p.4
4. Selye, Hans (1974). Stress without distress. Philadelphia: J.B. Lippincott Company. p. 171.
5. Selye, Hans (1983). "The Stress Concept: Past, Present and Future". In Cooper, C. L. (ed.). Stress Research Issues for the Eighties. New York, NY: John Wiley & Sons. pp. 1–20.
6. Selye, Hans (1975). "Implications of Stress Concept". New York State Journal of Medicine. 75 (12): 2139–2145. PMID 1059917.
7. Fevre, Mark Le; Kolt, Gregory S.; Matheny, Jonathan (1 January 2006). "Eustress, distress and their interpretation in primary and secondary occupational stress management interventions: which way first?". Journal of Managerial Psychology. 21 (6): 547–565. doi:10.1108/02683940610684391.
8. Chen, Yaniv (2009). "Advances in the pathophysiology of tension-type headache: From stress to central sensitization". Current Pain and Headache Reports. 13 (6): 484–494. doi:10.1007/s11916-009-0078-x. ISSN 1531-3433. PMID 19889292. S2CID 36447117.
9. Hargrove, M. B.; Nelson, D. L.; Cooper, C. L. (2013). "Generating eustress by challenging employees: Helping people savor their work". Organizational Dynamics. 42: 61–69. doi:10.1016/j.orgdyn.2012.12.008.
10. "stressor". Collins English Dictionary – Complete & Unabridged 11th Edition. Retrieved September 20, 2012, from CollinsDictionary.com. Archived from the original on June 20, 2012.
11. Pastorino, E. & Doyle-Portillo, S. (2009). What is Psychology?. 2nd Ed. Belmont, CA: Thompson Higher Education.
12. Ursin, H. (1988). "Expectancy and activation: An attempt to systematize stress theory". In Hellhammer, D.H.; Florin, I.; Weiner, H. (eds.). Neuronal Control of Bodily Function: Basic and Clinical Aspects, Vol. 2: Neurobiological Approaches to Human Disease. Kirkland, WA: Huber. pp. 313–334.
13. van Kampen, H.S. (2019). "The principle of consistency and the cause and function of behaviour". Behavioural Processes. 159: 42–54. doi:10.1016/j.beproc.2018.12.013. PMID 30562561. S2CID 56478466.
14. Headquarters, Department of the Army (1994). Leader’s Manual for Combat Stress Control, FM 22–51, Washington DC.
15. Teo, Loo Yee; Fam, Jia Yuin (2018). "Prevalence and determinants of perceived stress among undergraduate students in a Malaysian University". Journal of Health and Translational Medicine. 21 (1): 1–5.
16. Cohen, Sheldon; Frank, Ellen; Doyle, William J; Skoner, David P; Rabin, Bruce S; Gwaltney, Jack M (1998). "Types of stressors that increase susceptibility to the common cold in healthy adults". Health Psychology. 17 (3): 214–23. doi:10.1037/0278-6133.17.3.214. PMID 9619470. S2CID 15175643.
17. Jeronimus, Bertus F; Riese, Harriëtte; Sanderman, Robbert; Ormel, Johan (2014). "Mutual reinforcement between neuroticism and life experiences: A five-wave, 16-year study to test reciprocal causation". Journal of Personality and Social Psychology. 107 (4): 751–64. doi:10.1037/a0037009. PMID 25111305.
18. Jeronimus, B. F; Ormel, J; Aleman, A; Penninx, B. W. J. H; Riese, H (2013). "Negative and positive life events are associated with small but lasting change in neuroticism". Psychological Medicine. 43 (11): 2403–15. doi:10.1017/S0033291713000159. PMID 23410535.
19. Aldwin, Carolyn M; Jeong, Yu-Jin; Igarashi, Heidi; Choun, Soyoung; Spiro, Avron (2014). "Do hassles mediate between life events and mortality in older men?". Experimental Gerontology. 59: 74–80. doi:10.1016/j.exger.2014.06.019. PMC 4253863. PMID 24995936.
20. "CWT rolls out solution to tackle cost of travel stress". TTGmice. 2013-04-25. Retrieved 31 Jan 2019.
21. Campbell, Joan M (2016). "Ambient Stressors". Environment and Behavior. 15 (3): 355–80. doi:10.1177/0013916583153005. S2CID 220442210.
22. Headquarters, Department of the Army (2006). Combat and Operational Stress Control, FM 4-02.51, Washington, DC, p. 9
23. Whicker, Marcia Lynn. Toxic leaders: When organisations go bad. Westport, CT. Quorum Books. 1996.
24. Holmes, TH; Rahe, RH (1967). "The Social Readjustment Rating Scale". J Psychosom Res. 11 (2): 213–8. doi:10.1016/0022-3999(67)90010-4. PMID 6059863.
25. Riese, Harriëtte; Snieder, Harold; Jeronimus, Bertus F; Korhonen, Tellervo; Rose, Richard J; Kaprio, Jaakko; Ormel, Johan (2014). "Timing of Stressful Life Events Affects Stability and Change of Neuroticism". European Journal of Personality. 28 (2): 193–200. doi:10.1002/per.1929. S2CID 142517975.
26. Lundberg, Ulf (2010). "Neuroendocrine Measures". In Contrada, Richard; Baum, Andrew (eds.). The Handbook of Stress Science: Biology, Psychology, and Health. New York: Springer Publishing Company. p. 531. ISBN 9780826117717. Retrieved 30 November 2020. [...] epinephrine, norepinephrine, and cortisol are considered the most important 'stress hormones,' although a number of other hormones are also influenced by stress [...].
27. Krantz, David S.; Falconer, Jennifer F. (1997). "Measurement of cardiovascular responses". In Cohen, Sheldon; Kessler, Ronald C.; Underwood Gordon, Lynn (eds.). Measuring Stress: A Guide for Health and Social Scientists. A project of the Fetzer Institute (revised ed.). New York: Oxford University Press. pp. 193–212. ISBN 9780195121209. Retrieved 30 November 2020.
28. Kiecolt-Glaser, Janice; Glaser, Ronald (1997). "Measurement of immune response". In Cohen, Sheldon; Kessler, Ronald C.; Underwood Gordon, Lynn (eds.). Measuring Stress: A Guide for Health and Social Scientists. A project of the Fetzer Institute (revised ed.). New York: Oxford University Press. pp. 213–230. ISBN 9780195121209. Retrieved 30 November 2020.
29. Gottlieb, Benjamin."Coping with Chronic Stress". Plenum Press. 1997.
30. Mitterer, Jon; Coon, Dennis (2013). Introduction to Psychology. Jon-David Hague. pp. 446–447.
31. "HHS 231 – Extended Campus – Oregon State University". Archived from the original on 2012-10-10.
32. Cohen, S; Murphy, MLM; Prather, AA (4 January 2019). "Ten Surprising Facts About Stressful Life Events and Disease Risk". Annual Review of Psychology. 70: 577–597. doi:10.1146/annurev-psych-010418-102857. PMC 6996482. PMID 29949726. [...] the strongest conclusion derived from decades of research on stressors and cancer is that stressful events may be associated with decreased cancer survival but are probably not associated with disease incidence [...].
33. Cohen, Sheldon; Janicki-Deverts, Denise; Miller, Gregory E (2007). "Psychological Stress and Disease". JAMA. 298 (14): 1685–7. doi:10.1001/jama.298.14.1685. PMID 17925521.
34. Shahab, Lion; McGowan, Jennifer A.; Waller, Jo; Smith, Samuel G. (April 2018). "Prevalence of beliefs about actual and mythical causes of cancer and their association with socio-demographic and health-related characteristics: Findings from a cross-sectional survey in England". European Journal of Cancer. 103: 308–316. doi:10.1016/j.ejca.2018.03.029. PMC 6202672. PMID 29705530.
35. Hirotsu C, Tufik S, Andersen ML (September 2015). "Interactions between sleep, stress, and metabolism: From physiological to pathological conditions". Sleep Science (Sao Paulo, Brazil). Sleep Science. 8 (3): 143–152. doi:10.1016/j.slsci.2015.09.002. PMC 4688585. PMID 26779321.
36. Folkman, S., 2013. Stress: appraisal and coping. In Encyclopedia of behavioral medicine (pp. 1913–1915). Springer New York.
37. Schneiderman, N.; Ironson, G.; Siegel, S. D. (2005). "Stress and health: psychological, behavioral, and biological determinants". Annual Review of Clinical Psychology. 1: 607–628. doi:10.1146/annurev.clinpsy.1.102803.144141. PMC 2568977. PMID 17716101. Both epidemiological and controlled studies have demonstrated relationships between psychosocial stressors and disease. The underlying mediators, however, are unclear in most cases, although possible mechanisms have been explored in some experimental studies.
38. Herbert, T. B.; Cohen, S. (1993). "Stress and immunity in humans: a meta-analytic review". Psychosomatic Medicine. 55 (4): 364–379. CiteSeerX 10.1.1.125.6544. doi:10.1097/00006842-199307000-00004. PMID 8416086. S2CID 2025176.
39. Ogden, J. (2007). Health Psychology: a textbook (4th ed.), pages 281–282 New York: McGraw-Hill ISBN 0335214711
40. Edmunds, W. John (1997). "Social Ties and Susceptibility to the Common Cold". JAMA: The Journal of the American Medical Association. 278 (15): 1231, author reply 1232. doi:10.1001/jama.1997.03550150035018. PMID 9333253.
41. Compare: Greubel, Jana; Kecklund, Göran (March 2011). "The Impact of Organisational Changes on Work Stress, Sleep, Recovery and Health". Industrial Health. 49 (3): 353–364. doi:10.2486/indhealth.ms1211. PMID 21372437. [...] organizational changes, which include a change in job tasks or downsizing, lead to a somewhat increased stress level as well as slightly increased health problems. This study added that complaints about poor sleep, sleepiness and incomplete recovery also increased in connection with extensive organizational changes. Another key finding was that this is even true for the anticipation of such changes.
42. Schneiderman, N.; Ironson, G.; Siegel, S. D. (2005). "Stress and health: psychological, behavioral, and biological determinants". Annual Review of Clinical Psychology. 1: 607–628. doi:10.1146/annurev.clinpsy.1.102803.144141. PMC 2568977. PMID 17716101.
43. Schlotz W, Yim IS, Zoccola PM, Jansen L, Schulz P (2011). "The perceived stress reactivity scale: Measurement invariance, stability, and validity in three countries". Psychol Assess. (pp. 80–94).
44. Pinquart, Martin; Sörensen, Silvia (2003). "Differences between caregivers and non-caregivers in psychological health and physical health: A meta-analysis". Psychology and Aging. 18 (2): 250–67. doi:10.1037/0882-7974.18.2.250. PMID 12825775.
45. Kemeny, Margaret E. (August 2003). "The Psychobiology of Stress". Current Directions in Psychological Science. 12 (4): 124–129. doi:10.1111/1467-8721.01246. S2CID 145293197.
46. Kobasa, S. C. (1982). "The Hardy Personality: Toward a Social Psychology of Stress and Health". In G. S. Sanders & J. Suls (Eds.), Social Psychology of Health and Illness (pp. 1–25). Hillsdale, NJ: Lawrence Erlbaum Assoc.
47. Kingston, Cara; Schuurmans-Stekhoven, James (2016). "Life hassles and delusional ideation: Scoping the potential role of cognitive and affective mediators". Psychology and Psychotherapy: Theory, Research and Practice. 89 (4): 445–463. doi:10.1111/papt.12089. PMID 26846698.
48. Mah L, Szabuniewicz C, Fiocco AJ (2016). "Can anxiety damage the brain?". Current Opinion in Psychiatry (Review). 29 (1): 56–63. doi:10.1097/YCO.0000000000000223. PMID 26651008. S2CID 17911798. Pathological anxiety and chronic stress lead to structural degeneration and impaired functioning of the hippocampus and the PFC, which may account for the increased risk of developing neuropsychiatric disorders, including depression and dementia.
49. Keller, Abiola; Litzelman, Kristin; Wisk, Lauren E; Maddox, Torsheika; Cheng, Erika Rose; Creswell, Paul D; Witt, Whitney P (2012). "Does the perception that stress affects health matter? The association with health and mortality". Health Psychology. 31 (5): 677–84. doi:10.1037/a0026743. PMC 3374921. PMID 22201278. High amounts of stress and the perception that stress impacts health are each associated with poor health and mental health. Individuals who perceived that stress affects their health and reported a large amount of stress had an increased risk of premature death.
50. "Stress as a positive: Recent research that suggests it has benefits". 4 September 2013. Archived from the original on 11 September 2016.
51. "Psychological Stress and Disease (HIV/AIDS)". www.natap.org. Retrieved 2018-10-01.
52. {cite journal|last1= Miller|first1= Gregory|last2= Chen|first2= Edith|last3= Cole|first3= Steve W|year= 2009|title= Health Psychology: Developing Biologically Plausible Models Linking the Social World and Physical Health|journal= Annual Review of Psychology|volume= 60|pages= 501–24|doi= 10.1146/annurev.psych.60.110707.163551|pmid= 19035829|doi-access= free}}
53. Craven, Ruth; Hirnle, Constance; Jensen, Sharon (2013). Fundamentals of Nursing: Human and Health Function (7 ed.). Philadelphia: Lippincott Williams & Wilkins. p. 1319.
54. Morrison-Valfre, Michelle (2009). Foundations of mental health care (4th ed.). St. Louis, Mo.: Mosby/Elsevier. ISBN 978-0-323-05644-1.
55. "Stress in childhood: MedlinePlus Medical Encyclopedia". medlineplus.gov. Retrieved 2018-10-01.
56. Uchino, B. N. (2009). "Understanding the links between social support and physical health: A life-span perspective with emphasis on the separability of perceived and received support". Perspectives on Psychological Science. 4 (3): 236–255. CiteSeerX 10.1.1.713.8624. doi:10.1111/j.1745-6924.2009.01122.x. PMID 26158961. S2CID 17551921.
57. Berkman, L. F.; Glass, T.; Brissette, I.; Seeman, T. E. (2000). "From social integration to health: Durkheim in the new millennium". Social Science & Medicine. 51 (6): 843–857. doi:10.1016/s0277-9536(00)00065-4. PMID 10972429.
58. Cohen, S.; Wills, T. A. (1985). "Stress, social support, and the buffering hypothesis". Psychological Bulletin. 98 (2): 310–357. doi:10.1037/0033-2909.98.2.310. PMID 3901065. S2CID 18137066.
59. Cohen, S (2004). "Social relationships and health". American Psychologist. 59 (8): 676–684. doi:10.1037/0003-066x.59.8.676. PMID 15554821.
60. Greenberg. Comprehensive Stress Management 10E. McGraw-Hill Education. pp. 261–. ISBN 978-0-07-067104-1. Archived from the original on 2017-02-18.
61. Robertson, D (2012). Build your Resilience. London: Hodder. ISBN 978-1-4441-6871-6.
62. Purwandini Sutarto, Auditya; Abdul Wahab, Muhammad Nubli; Mat Zin, Nora (2015). "Resonant Breathing Biofeedback Training for Stress Reduction Among Manufacturing Operators". International Journal of Occupational Safety and Ergonomics. 18 (4): 549–61. doi:10.1080/10803548.2012.11076959. PMID 23294659.
63. Anxiety and Depression Association of America. (n.d.). Exercise for Stress and Anxiety. Retrieved from https://adaa.org/living-with-anxiety/managing-anxiety/exercise-stress-and-anxiety
64. Breus, MJ; O'Connor, PJ (July 1998). "Exercise-induced anxiolysis: a test of the "time out" hypothesis in high anxious females". Medicine and Science in Sports and Exercise. 30 (7): 1107–12. doi:10.1097/00005768-199807000-00013. PMID 9662680.
65. Snyder, C.R.; Lefcourt, Herbert M. (2001). Coping With Stress. New York: Oxford University. pp. 68–88.
66. Levo, Lynn M. (2003, September.) Understanding Defense Mechanisms. Lukenotes. 7(4). St. Luke Institute, MD.
67. Adapted from DSM-IV Adaptive Functioning Scale, APA, 1994.
68. Riley, Julia (2012). Communication in Nursing (7 ed.). Missouri: Mosby/Elsevier. pp. 160–173.
69. Lefcourt, H. M. (2001). "The Humour Solution". In Snyder, C. R. (ed.). Coping with Stress: Effective People and Processes. New York: Oxford University Press. pp. 68–92. ISBN 978-0198029953.
70. Valliant, George E. (2000). "Adaptive Mental Mechanisms". American Psychologist. 55 (1): 89–98. doi:10.1037/0003-066x.55.1.89. PMID 11392869.
71. Folkman, S.; Moskowitz, J. (2000). "Stress, Positive Emotion, and Coping". Current Directions in Psychological Science. 9 (4): 115–118. doi:10.1111/1467-8721.00073. S2CID 1288773.
72. Schok ML, Kleber RJ, Elands M, Weerts JM (2008). "Meaning as a mission: a review of empirical studies on appraisals of war and peacekeeping experiences". Clinical Psychology Review (Review). 28 (3): 357–65. doi:10.1016/j.cpr.2007.04.005. PMID 17532104.
73. "displacement n." A Dictionary of Psychology. Edited by Andrew M. Colman. Oxford University Press 2009. Oxford Reference Online. Oxford University Press.
74. https://www.secretintelligenceservice.org/wp-content/uploads/2016/02/Freudian-defense-mechanisms.pdf
75. Potter, Patricia (2014). Canadian Fundamentals of Nursing (5 ed.). Toronto: Elsevier. pp. 472–488.
76. "stress". Oxford English Dictionary (2nd ed.). Oxford University Press. 1989. - "1955 H. Basowitz et al. Anxiety & Stress i. 7 Anxiety has been defined in terms of an affective response; stress is the stimulus condition likely to arouse such response."
77. Harper, Douglas. "stress". Online Etymology Dictionary. Retrieved 2019-04-19. - "stress (n.) [...] The purely psychological sense is attested from 1955."
78. Linn, Margaret W. (1986). "Elderly Women's Health and Psychological Adjustment: Life Stressors and Social Support". In Hobfoll, Stevan E. (ed.). Stress, Social Support, And Women. Clinical and Community Psychology. Abingdon: Taylor & Francis (published 2014). p. 233. ISBN 9781317770602. Retrieved 20 July 2020. Although the SRRS identified women with high and low stress, it also appeared limited in covering certain areas of stress currently felt by these women. For example, worry and concern about events that have not happened, or in some cases did happen but were not included on the scale, were common.
79. Once widely recognised, passion appears to wane in importance as the concept of "stress" becomes popular. See a usage Ngram for the two terms.
80. For example: Carr, Alan (2012). Clinical Psychology: An Introduction. London: Routledge. p. 22. ISBN 9780415683975. Retrieved 2019-04-19. This stress-induced focus on the self is compounded by exposure to 'pop-psychology' advice to use selffocused stress management techniques during interviews.
81. Cohen, Lisa J. (2011). "Mental Health and Mental Illness". The Handy Psychology Answer Book. The Handy Answer Book Series. Detroit: Visible Ink Press. p. 401. ISBN 9781578593545. Retrieved 2019-04-19. Popular or pop psychology is aimed at a popular audience and communicated through the mass media. It addresses topics related to psychology—such as romantic relationships, stress management, child rearing, and sexuality [...]

Further reading

• Kelly McGonigal (2015). The Upside of Stress: Why Stress Is Good for You, and How to Get Good at It. Avery. ISBN 978-1583335611.
• "Manage Stress - healthfinder.gov". healthfinder.gov. Retrieved 2019-07-22.

Classification	D MeSH: D013315 SNOMED CT: 73595000
External resources	MedlinePlus: 003211