
It is essential for survival, but it can become destructive if it lasts too long or occurs too frequently. Modern psychology views stress as a complex phenomenon that includes physiological, cognitive, and emotional components. Understanding stress mechanisms is important not only for specialists but for anyone who wants to maintain mental and physical health (American Psychological Association).
The History of Stress Research
The concept of stress was introduced into science by Canadian endocrinologist Hans Selye. His "General Adaptation Syndrome" described three stages of the body’s response to stress: alarm, resistance, and exhaustion. Later, psychologists and neuroscientists expanded this concept by adding the role of cognitive processes and emotions. Today, stress is studied at the intersection of psychology, neuroscience, and medicine.
Physiological Mechanisms
Activation of the Sympathetic Nervous System
When faced with a potential threat, the body instantly activates the sympathetic nervous system. The heart beats faster, breathing quickens, and pupils dilate. This is the so-called "fight or flight" response. It was vital for our ancestors facing dangers in the wild, and it still functions today—for example, during public speaking or exams (Harvard Health).
Hormonal Response: Cortisol and Adrenaline
The hypothalamic-pituitary-adrenal (HPA) axis regulates the production of stress hormones. Cortisol helps maintain energy levels and focus, but chronic overproduction leads to sleep disturbances, weakened immunity, and increased risk of depression (PubMed).
For example: students during exam season often experience elevated cortisol levels. This may help them concentrate in the short term, but prolonged exposure can cause fatigue and decreased motivation.
Psychological Mechanisms
Cognitive Appraisal
American psychologist Richard Lazarus demonstrated that stress depends not so much on the event itself but on how a person interprets it. If an exam is seen as an opportunity to demonstrate knowledge, it can lead to eustress. If it is perceived as a threat of failure and punishment, it causes distress. Thus, perception plays a key role in shaping the stress response.
Emotions and Stress
Emotions can amplify or reduce the stress response. Fear may paralyze, while excitement can energize. Interestingly, the same physiological reactions (increased heartbeat, sweating) may be interpreted as either anxiety or enthusiasm (Mayo Clinic).
Coping Strategies
Psychologists identify several types of coping strategies:
- Problem-focused — attempts to change the situation (e.g., preparing for an exam).
- Emotion-focused — regulating emotional responses (e.g., breathing practices, meditation).
- Avoidance — ignoring the problem, which may temporarily reduce anxiety but worsens it in the long run.
Chronic Stress and Its Consequences
Short-term stress mobilizes resources, but chronic stress has destructive effects. Consequences include:
- psychosomatic disorders (headaches, stomachaches);
- decreased cognitive functions (memory, concentration);
- emotional burnout;
- increased risk of cardiovascular disease.
For example: a manager constantly working under deadline pressure may initially perform well but over time develop chronic fatigue, irritability, and apathy.
Social and Cultural Aspects of Stress
Stress is not only an individual but also a social phenomenon. Stressors differ across cultures: in some societies, pressure comes from career demands; in others, from family obligations. Social support plays a huge role in reducing the impact of stress. Research shows that strong social networks lower the likelihood of anxiety and depression.
Individual Differences
Susceptibility to stress depends on:
- Personality traits: optimists are less prone to distress.
- Life experiences: past trauma increases reactivity to future stressors.
- Self-regulation skills: relaxation and meditation practices reduce cortisol levels.
Conclusion
Stress is a multifaceted phenomenon involving physiological, cognitive, and social mechanisms. It can be a source of energy and motivation or a destructive factor. The outcome depends on perception, duration, and coping resources. A mindful attitude toward stress and understanding its mechanisms help us adapt better to the challenges of modern life.
This material is for informational purposes only and does not replace professional consultation. If you experience symptoms, please consult a psychologist or physician.