The stress response is useful
For a short time, it increases alertness, energy supply, and readiness to act.
Stress is not our enemy. Without a stress response, we would not be able to retreat from danger in time, gather strength for a difficult task, or respond quickly when someone needs help. The problem begins when the body almost continuously receives messages that it must remain prepared.
In the second part of the series, we explain step by step how the brain detects danger; how the sympathetic nervous system and hypothalamic–pituitary–adrenal axis respond; what adrenaline and cortisol do; and why months of strain can lead to insomnia, tension, digestive problems, poorer concentration and a feeling of complete exhaustion.
The body does not always distinguish the type of danger
A short deadline, conflict, or warning can trigger the same system as a direct physical threat.
Stress must be followed by recovery
A healthy stress response is not just activation. Just as important are calming and returning to balance.
It is not only about »willpower«
Prolonged stress affects sleep, attention, muscles, digestion, and behavioral habits.
Why can stress be useful?
When a car suddenly stops in front of you, you don't need long deliberation. Your body increases alertness, tenses muscles, and prepares you to press the brake within a fraction of a second. The same system can help you before a performance, an important conversation, or a physically demanding task. The stress response is essentially a survival system.
The word stress is often used only negatively, but acute stress is a normal and necessary part of life. For a short time, it can improve attention, speed up response, and mobilize the energy we need to face a challenge. The problem is not every increase in heart rate or every tension before an important event.
The key difference is whether the body can return to a calmer state after the challenge. A healthy pattern is similar to a wave:
ChallengeThe body or mind perceives a demand.
ActivationAlertness and readiness increase.
InterventionEnergy is directed toward the task.
ConclusionThe danger or task passes.
RecoveryBreathing, heart rate, and muscle tension subside.
In chronic stress, the latter part of this wave becomes progressively shorter or nearly disappears. Before the body truly calms down, a new message, task, conflict, worry, or internal pressure arises. A person may appear calm on the outside, but remains in a state of heightened readiness internally.
The stressor and the stress response are not the same
A stressor is an event or situation: a short deadline, uncertainty, illness, conflict, noise, or financial worry. The stress response is how the body and mind respond to this. For some stressors, we can act directly, while for others we must improve support, boundaries, and the way we return to balance after the load.
What happens in the body when the brain detects a threat?
The stress response does not begin in the adrenal glands, but in the brain. Information from the environment and body is quickly evaluated: is something safe, important, or dangerous? Many brain areas are involved in this. For simplified understanding, the amygdala, hypothalamus, and prefrontal cortex are particularly important.
Amygdala: fast alarm system
The amygdala is involved in emotional evaluation of events and recognizing the significance of danger. Its advantage is speed. Sometimes it triggers an alarm even before we consciously understand what has happened. This is useful in direct danger, but can also lead to false alarms, especially when we are already tired, scared, or have been exposed to stress for a long time.
Hypothalamus: the link between the brain and the body
The hypothalamus is a small but important area that helps coordinate the autonomic nervous system and hormonal responses. When it detects a need for action, it can trigger two connected pathways:
- fast neural pathway, in which the sympathetic nervous system is activated and the adrenal medulla primarily secretes adrenaline and noradrenaline;
- a somewhat slower hormonal pathway, known as the hypothalamic-pituitary-adrenal axis or HPA-axis.
Recognized dangerThe brain evaluates the event as significant or threatening.
HypothalamusTriggers the CRH signal.
Pituitary glandReleases ACTH into the bloodstream.
Adrenal cortexResponds by secreting cortisol.
Feedback loopCortisol helps regulate and later limit the response.
What does the rapid response do?
The heart begins to beat faster, breathing accelerates, muscles receive more blood, the liver helps increase energy availability, and attention narrows to what is most important in the current moment. Activities that are not essential for immediate survival can temporarily move into the background. Digestion can slow down or change, sexual interest decreases, and muscles tense up.
All of this makes sense if we need to run, fight, or make a quick decision for a few minutes. However, if a similar state lasts for hours a day, weeks, or months, it can begin to disrupt systems that require calmer conditions: quality sleep, digestion, tissue repair, flexible attention, and emotional regulation.
Simplified explanation, not a mechanical switch
The nervous and hormonal responses are not an on–off switch. The body continually adjusts its level of activation, and its response depends on the time of day, sleep, physical fitness, past experiences, health, medication, and what the event means to the person.
Three phases of the stress cycle
To understand chronic stress, the three-phase model is often used: alarm, adaptation or resistance, and exhaustion. The model is useful as a map, but it does not mean that every person goes through three strictly separate stages or that we can diagnose based on them.
1
Alarm
The body detects a demand and quickly mobilizes energy. Alertness, heart rate, muscle tension, and readiness to act increase.
- feeling of internal acceleration,
- rapid breathing,
- tense muscles,
- narrowed attention.
2
Adaptation or resistance
The strongest alarm slightly relaxes, but the organism remains prepared. A person can work seemingly normally for a long time, although they use a lot of reserves.
- »I can still manage«, but without real recovery,
- constant tension in the background,
- poorer sleep,
- more caffeine or work to maintain the pace.
3
Exhaustion
Adaptability capacity decreases. Pronounced fatigue, concentration difficulties, emotional detachment, and slower recovery appear.
- rest is no longer sufficient,
- reduced resistance to new stressors,
- more errors and irritability,
- the feeling that the body 'is not cooperating'.
The most deceptive phase is the middle phase
In the alarm phase, a person feels under pressure. In the exhaustion phase, they realize something is wrong. In the long-term adaptation phase, they may get the impression that everything is under control. They still perform tasks, others see them as reliable, and they may even receive recognition. However, work requires increasing internal effort.
At that time, small signs often appear: in the evening, they are tired but cannot fall asleep; on a free day, they cannot relax; they have difficulty listening to others; they need more coffee; a phone notification tenses them up instantly; fun and relationships seem like additional tasks. Because they are still working, they may interpret them as a lack of discipline rather than a warning.
A person in the long-term resistance phase is not necessarily seen as weak. They often appear incredibly capable. That is why the environment and even the person themselves notice so late how much energy is spent to maintain the appearance of normal functioning.
Cortisol is not the enemy
Cortisol is often described as the 'bad stress hormone', but that description is too simplified. Cortisol is essential for life. It helps regulate metabolism, blood pressure, immune response, and energy availability. It also has a normal daily rhythm: in most people, it is higher in the early morning hours and gradually decreases throughout the day.
The problem is not that cortisol exists. What matters is the time, duration, intensity and rhythm of the hormonal response. In long-term stress, the regulation of the HPA axis can change. In some people, certain values are elevated, in others the daily rhythm may be flatter or the response may be less responsive. Therefore, it is not possible to reliably conclude that someone has 'too much cortisol' based on one symptom or a single random measurement.
What does cortisol do during the stress response?
- it helps ensure energy availability,
- supports blood circulation and response to stress,
- temporarily changes the body's priorities
- plays a role in the feedback regulation of the stress response.
Why is the popular explanation potentially misleading?
On the internet, almost every symptom – abdominal fat, fatigue, insomnia, anxiety, or a craving for sweets – is sometimes attributed to 'high cortisol.' In reality, these symptoms have many possible causes. Cortisol is only part of a broader system that includes the nervous system, sleep, metabolism, inflammatory processes, behavior, and environment.
Do not make a diagnosis based solely on a feeling
Diseases in which cortisol is indeed too high or too low are medical conditions that require proper diagnosis. Long-term fatigue, significant changes in body weight, muscle weakness, fainting, or other unusual problems are not a reason for self-treatment of the adrenal glands, but for a conversation with a doctor.
How can chronic stress affect the body?
Stress does not automatically cause disease, but it can affect many body systems and worsen existing problems. The effect depends on the duration of the stressor, sleep, lifestyle habits, health, social support, and genetic factors.
Brain and attention
Short-term attention narrows on danger. Long-term, a person may find it harder to switch between tasks, plan, remember details, and make calm decisions. This is not necessarily a loss of ability, but the brain operating in a mode of constant prioritization of danger.
Sleep
Increased alertness makes falling asleep more difficult, and at night it can cause waking up. Poor sleep then increases emotional reactivity and reduces the ability to manage the next day, thus creating a feedback loop of stress and insomnia.
Heart and blood circulation
Acute stress temporarily increases heart rate and raises blood pressure. If the stressors are frequent, they can together with other factors contribute to greater cardiovascular strain. However, individual palpitations should not be automatically attributed to stress alone.
Breathing
A person may begin to breathe faster, shallowly, or predominantly with the upper part of the chest. This can reinforce the feeling of tension, and in susceptible individuals, it can also cause dizziness or tingling.
Muscles and pain
The shoulders, neck, jaw, back, and pelvic floor can remain tense even without physical exertion. Chronic muscle tension can contribute to headaches and pain, and the pain then becomes a new stressor.
Digestion
Stress can affect gut sensitivity, intestinal motility, appetite and experiences of nausea, bloating or pain. The connection between the brain and the gut runs both ways, so digestive problems are not “all in your head”.
Immune regulation
Short-term and long-term stress do not have the same effects. Chronic overload can change immune regulation and inflammatory processes, but the relationship is complex and cannot be explained by a single hormone.
Metabolism and behavior
Stress also has indirect effects: when sleep and energy are lacking, people may move less, turn more often to fast food, caffeine or alcohol, and find it harder to eat regular meals. Over time, these habits can place an additional burden on metabolism.
Sexuality and reproductive health
When the organism long prioritizes survival and obligations, sexual desire can decrease. Many factors influence the cycle, erection, fertility and other issues, so long-term changes require appropriate treatment.
Emotions and relationships
A person becomes more irritable, less patient, or emotionally numb. Often they withdraw from people who could help them, because even conversation is experienced as a new demand.
Important
Stress can explain part of the problems, but it should not become a basket into which we throw every symptom. A new, strong, unusual or long-lasting physical problem deserves a medical evaluation, even if it appeared during a stressful period.
How can you tell when your body remains on alert?
The following list is not a diagnostic test. It is intended for you to observe a pattern. Mark the statements that occur frequently or almost every day for you.
Even when I have free time, I feel like I should do something.
At the sound of a notification, phone call, or work message, I immediately tense up.
In the evening I am tired, but I have difficulty turning off my thoughts or falling asleep.
I often clench my jaw, raise my shoulders, or feel tension in my neck and back.
I have difficulty breathing slowly; I often sigh or breathe shallowly.
I am quickly disturbed by noise, interruption, or minor mistakes.
To maintain my pace, I need more and more caffeine, sugar, or other stimulants.
When I finally stop, I don't relax, but instead become restless.
It is hard for me to focus on one thing and I often switch between tasks.
I have less joy in things that used to relax me.
After a short break, I feel better, but the exhaustion returns very quickly.
It is hard for me to tell people that I can't, so I often take on another task.
If you checked more statements, it may be worth taking a closer look at your stressors, sleep, boundaries and health. In the next article in the series, Am I burned out?, physical, emotional, mental, and behavioral signs we examine even more systematically.
Seek help without delay
If you have thoughts of death or self-harm, profound hopelessness, an inability to manage basic daily activities, severe insomnia, new chest pain, fainting or other alarming symptoms, do not wait for another article or a home protocol. Seek emergency or other appropriate professional help.
How can we help the body complete the stress cycle?
»Completing the stress cycle« does not mean we need to remove all stress. This is impossible and also unnecessary. It means that after a period of activation, we give the body a clear signal multiple times that the immediate danger has passed and that recovery can begin.
1. First, reduce the actual stressor where possible
Breathing exercises cannot eliminate an unsustainable schedule, degrading relationship, or constant availability. For some issues, the first step is conversation, work reorganization, clear boundaries, help from another person, or a professional solution.
2. Use movement according to current capacity
Physical activity can help burn off some of the mobilized energy and improve feelings. However, an exhausted person does not necessarily need intense training. For a start, a walk, gentle cycling, stretching, or a few minutes of slow movement may be more suitable. The goal is not to prove anything, but rather a better transition from tension to relaxation.
3. Consciously slow down your breathing
Relaxation techniques such as slow breathing, guided imagery, progressive muscle relaxation and autogenic training aim to elicit a relaxation response, during which breathing and heart rate settle. Avoid forcing very deep breaths; a gentle, comfortable and slightly slower rhythm matters more.
4. Create a clear end to the workday
The brain has difficulty recognizing that work is done if work-related content comes into the bedroom, on the couch, and to the dining table. Small rituals help: closing the computer at a specific time, writing down tasks for tomorrow, changing clothes, a short walk, or turning off notifications. Arianna Huffington emphasized sleep and the need for periods of digital inaccessibility based on her own experience of burnout.
5. Find safe human closeness
A conversation with someone you don't need to prove yourself to can reduce the feeling of being threatened. Social support doesn't necessarily mean a long conversation about the problems. Sometimes a shared meal, a walk, humor, or quiet presence help.
6. Use creativity and activities without a goal
Drawing, music, gardening, manual work, cooking, or writing can divert attention from recurring worries. It is essential that even free time is not turned into a new area of measuring success.
7. Treat sleep as a foundation, not a reward
If a person always postpones sleep until after finishing work, work almost always prevails. Poor sleep then reduces the ability to regulate emotions and the stress response. The entire fifth article in the series is devoted to the connection between sleep, phones, and burnout.
A ten-minute transition after stress
- For two minutes, put away your phone and notice where in your body there is the most tension.
- Walk for three minutes or gently stretch your shoulders, arms, and back.
- Breathe comfortably through your nose for three minutes, with a slightly longer exhale, without forcing.
- Take two minutes to write down what has been completed today and what can wait until tomorrow.
This is not a treatment for burnout, but a small repeatable signal that a certain part of the day has ended.
Short breaks are not indulgences
If throughout the day we reduce activation several times for a few minutes, the evening transition into rest can be easier. The point is not complete relaxation after every stressor, but preventing tension from accumulating throughout the day.
Frequency support for an overburdened nervous system
Within the scope of this series of frequency devices, we do not present them as a means to »turn off cortisol«, reset the HPA-axis, or eliminate the cause of burnout. Such promises would be overly simplified and cannot be responsibly made.
Possible place within a broader routine
Zapper-Pro, Tor-Gen, F-Gen and 11-HRF can be included as a complementary part of time already dedicated to rest, relaxation, and emotional support. The device should not replace sleep, reduction of stress, movement, human relationships, or professional treatment.
Zapper-Pro
In the sixth article of the burnout series, we mention programs and frequencies for use with the Zapper-Pro that are linked in frequency lists to stress, tension, sleep, and fatigue. At this point, the more important aspect is the method of inclusion: a quiet time without additional effort, moderate duration, and monitoring of one's own response.
Tor-Gen and F-Gen
Tor-Gen and F-Gen can become part of a relaxation space, similar to calming music, breathing, or rest. We would not present them as direct treatment for burnout, but rather as a supportive element of a broader evening or regenerative routine.
11-HRF
11-HRF is included in the sixth part of the series where there is a clear connection with its intended use.
The Basic Principle for the Burned-Out Individual
Start with something simple. Instead of multiple devices, multiple programs, and long protocols, it is usually more meaningful to choose one gentle supportive approach, incorporate it into a calm part of the day, and monitor sleep, stress, and well-being. If use causes discomfort, headache, intense anxiety, or worsening of well-being, it should be discontinued or adjusted.
Continue reading
Now we understand why the body can remain in a state of heightened readiness. In the third part, this knowledge is connected with specific signs and the question: how to distinguish a stressful period from a more serious pattern of burnout?
Sources and recommended reading
In preparing this series, we checked the source material against official health information and specialist reviews. The three-phase model is presented as a useful educational framework, not a diagnostic test.
National Institute of Mental Health. I’m So Stressed Out! Fact Sheet. Review of the difference between stress and anxiety and common physical signs of stress. Open source
National Center for Complementary and Integrative Health. Relaxation Techniques: What You Need To Know. Review of the relaxation response, slow breathing, progressive relaxation, and other techniques. Open source
National Center for Complementary and Integrative Health. Stress. Information on the body's response to stress and complementary approaches. Open source
American Psychological Association. Stress effects on the body. Review of links between stress and the musculoskeletal, respiratory, cardiovascular, endocrine, digestive, and reproductive systems. Open source
World Health Organization. Burn-out an occupational phenomenon. Official description of burnout as a result of chronic workplace stress that has not been successfully managed. Open source
World Health Organization. Mental health at work. Review of psychosocial risks, protective factors, and the importance of organizational measures. Open source
McEwen BS. Protective and damaging effects of stress mediators. New England Journal of Medicine, 1998. Fundamental review of adaptive and harmful effects of stress mediators and the concept of allostatic load. Open source
Chrousos GP. Stress and disorders of the stress system. Nature Reviews Endocrinology, 2009. Review of the physiology of the stress system and the effects of long-term altered regulation. Open source
Material for the preparation of the series: Three Phases of the Stress Cycle and Five Ways to Complete the Stress Cycle; Documentary Investigates the Causes and Ramifications of Stress-Related Burnout; How to Recover From Burnout by Rebalancing Your Life; interviews with Dr. Joseph Maroon and Arianna Huffington.
Joseph Maroon. Square One: A Simple Guide to a Balanced Life. Personal experience of burnout and a model of balance between the body, work, relationships, and spirituality or meaning.
Arianna Huffington. Thrive: The Third Metric to Redefining Success and Creating a Life of Well-Being, Wisdom, and Wonder. Emphasis on sleep, digital detox, and changing success metrics.
Health explanation: The content is informational and not intended for diagnosis or treatment. Stress can affect feelings and health, but many symptoms are not specific to it. If you have long-term, unusual, or severe problems, consult a doctor or appropriately qualified professional. Frequency devices are presented as complementary support and not as a substitute for professional treatment.