Stress, Health & Coping
A deadline. A diagnosis. A hard talk with someone you love. The events we call "stressful" are very different from each other. Yet your body answers almost all of them with the same old alarm. This chapter is about that alarm. You will learn what sets it off, which hormones it sends out, and what it does to your heart and immune system when it never shuts off. There is good news too. How you read a situation, and how you respond to it, changes a great deal. The skills of coping, connection, and resilience can be learned. Stress is not just something that happens to you. It is a back-and-forth between a demand and the resources you bring to meet it.
By the end of this chapter you can
- Define stress, and tell a stressor apart from the stress response.
- Explain Lazarus's appraisal model, with its primary and secondary appraisal.
- Describe the fight-or-flight response and the jobs of the sympathetic nervous system and adrenaline.
- Outline Selye's general adaptation syndrome, and trace the HPA axis down to cortisol.
- Explain how chronic stress harms the cardiovascular system and the immune system.
- Tell problem-focused coping from emotion-focused coping, and match each one to the situation.
- Describe how social support softens stress, and why relationships protect health.
- Sum up what positive psychology says about happiness and what goes into resilience.
Section 1What stress is
Stressor, response, and the appraisal in between
In everyday talk, "stress" means whatever is bothering us. Psychologists split the idea into two parts. A stressor is the demand or threat itself. It might be the exam, the traffic, or the argument. The stress response is what happens inside you when you meet it. Your heart races, hormones flood your blood, and your thoughts churn.
Stress, then, is best defined as the whole process. It is how we notice and respond to events we judge as threatening or challenging. The word judge is the key. The same event can flatten one person and fire up another. A stressor only becomes stressful after the brain has sized it up. Psychologists call that sizing up an appraisal.
Not all stress is bad. Hans Selye coined the word eustress for good stress. It is the stress of a challenge you feel able to meet, such as a first date, a big game, or a promotion. Its opposite is distress, the draining, harmful kind. The difference often lies less in the event and more in how you see it. Is it a threat to survive, or a challenge to rise to?
Kinds of stressors
Stressors come in several sizes. Cataclysmic events are sudden, large disasters that strike many people at once. Earthquakes, war, and a pandemic are examples.
Significant life changes are big personal shake-ups, such as a death, a divorce, or a move. Thomas Holmes and Richard Rahe built the classic Social Readjustment Rating Scale. It gives each life event a score for how much readjusting it demands. They found that a pile-up of changes predicts later illness. The link is real but modest, so a high score does not doom anyone to get sick.
Then there are the daily hassles. Think of lost keys, a rude email, and the endless small frictions of a day. Each one seems tiny. Added together, though, they may wear down health as surely as the dramatic events do. A special case is ambient stressors. These are background conditions like noise, crowding, or a long commute. They are chronic, low-level, and mostly outside our control.
| Kind of stressor | What it is | Example |
|---|---|---|
| Cataclysmic | Sudden and large; hits many people at once | Natural disaster, war, pandemic |
| Significant life change | A major personal change that takes readjusting | A death in the family, divorce, job loss, new baby |
| Daily hassle | A small irritation; harmful mainly when they pile up | Traffic, lost keys, a hard coworker |
| Ambient | A background condition; low-level but constant | Noise, crowding, air pollution, long commute |
| Acute vs. chronic | Short and passing vs. long and unrelenting | A near-miss in traffic vs. caring for a sick parent for years |
Appraisal: the mind's first move
Richard Lazarus argued that stress is a transaction, a give-and-take between a person and a situation. Two quick judgments sit in the middle. In primary appraisal you ask, "Is this a problem? Is it a threat, a challenge, or nothing to worry about?" In secondary appraisal you ask, "Can I handle it? What resources do I have?"
Stress flares when the demand looks big and your resources look small. The same demand feels like a doable challenge when you judge yourself equal to it. This is why two students facing the same exam can have opposite experiences. It is also why building skills, support, and confidence lowers stress, even when the stressors stay the same.
The fight-or-flight response
When the appraisal comes back "threat," the body acts before you finish thinking. The physiologist Walter Cannon named this the fight-or-flight response. First, the sympathetic nervous system fires. This is the branch of the nervous system that speeds the body up. Then the adrenal glands pour epinephrine into the blood. Epinephrine is the same hormone as adrenaline.
Within seconds, the heart pounds and breathing speeds up. The pupils widen, the muscles tense, and digestion stops. Blood and fuel rush to the muscles and brain. Now you can face the danger or run from it. This is a superb system for escaping a predator, and that is what it evolved to do.
Its flaw is that a traffic jam or an unanswered text can flip the very same switch. Think of a zebra that sprints away from a lion. Once it is safe, it goes back to grazing in peace. Humans, by contrast, can keep the alarm ringing for hours, days, or even years.
- A stressor is the demand. The stress response is your reaction. Stress is the whole process, including your appraisal.
- Stressors range from cataclysmic events to daily hassles. Small hassles do harm by piling up.
- Lazarus: stress depends on primary appraisal (Is it a threat?) and secondary appraisal (Can I cope?).
- The fight-or-flight response (Cannon) is a fast sympathetic surge driven by adrenaline. It is built for short emergencies.
Section 2The stress response
Selye's general adaptation syndrome
Hans Selye is often called the father of stress research. In the 1930s he noticed something odd about his lab rats. He exposed them to heat, cold, toxins, and injury. No matter what he did, their bodies showed the same three-part pattern. He called it the general adaptation syndrome (GAS). It is "general" because the body reacts the same way to almost any long-lasting stressor.
The GAS unfolds in three stages. In the alarm reaction, the body gathers its resources and the fight-or-flight surge takes over. In the resistance stage, the body settles into high alert. Hormones help it keep coping while the stressor goes on. You feel like you are managing, but it costs you. If the stressor never lets up, the body reaches exhaustion. Its reserves are used up and its defenses fail. The risk of illness, burnout, and breakdown climbs sharply.
| GAS stage | What is happening | How it feels and what it costs |
|---|---|---|
| Alarm | Fight-or-flight surge; resources gathered | Racing heart, high arousal, a "shock" and then a rebound |
| Resistance | Long high alert; hormones keep the body coping | Coping but running down; crankiness and tiredness build |
| Exhaustion | Reserves run out; defenses weaken | Illness, burnout, a breakdown in daily functioning |
Two roads out of the brain: the SAM and HPA axes
The stress response actually travels along two paths at two speeds. The fast path is the SAM axis, short for sympathetic-adrenal-medullary. The sympathetic nerves signal the adrenal medulla, the inner part of the adrenal gland. It releases adrenaline in seconds. This is the fight-or-flight jolt from Section 1.
The slower, longer-lasting path is the HPA axis. It is the star of the chronic-stress story. It works like a relay race. The hypothalamus, a small region deep in the brain, releases a hormone called CRH. CRH tells the pituitary gland to release ACTH. ACTH travels in the blood to the adrenal cortex, the outer layer of the adrenal gland. The adrenal cortex then pours out cortisol, the body's main stress hormone. Cortisol keeps sugar (glucose) flowing to the muscles and brain. It sharpens attention. It also turns down jobs that can wait until the emergency is over, such as immunity and digestion.
In short bursts, cortisol saves lives. The problem is that the HPA axis was built to switch off once the threat is gone. Sometimes appraisal keeps signaling "threat." The cause might be a stressful job, an unhappy relationship, or money fears. Then cortisol stays high for weeks or months. A hormone that protects you in the short run becomes harmful in the long run.
Allostatic load: the price of staying switched on
The body keeps itself steady by adjusting to change. This process is called allostasis. Each time the stress system turns on and then recovers, it is doing its job. But turning on again and again, or never turning off, takes a toll on the organs that carry the load. Researchers call this built-up wear and tear the allostatic load.
Allostatic load is the bridge in the body between "I feel stressed all the time" and the diseases that stress helps cause. Those diseases are the topic of the next section. The neuroscientist Robert Sapolsky summed up the idea in the title of his book, Why Zebras Don't Get Ulcers. A zebra's stressors end when the chase does. Ours often do not. (One note: most stomach ulcers are caused by a germ, Helicobacter pylori, or by pain-relief drugs. Stress can make them worse, but it is rarely the main cause.)
- Selye's GAS has three stages: alarm, resistance, and exhaustion.
- The fast SAM axis releases adrenaline. The slower HPA axis runs hypothalamus → pituitary → adrenal cortex → cortisol.
- Cortisol protects you in short bursts but harms you when it stays high.
- Allostatic load is the built-up wear on the body from a stress system that never switches off.
Section 3Stress and health
Stress and the heart
The clearest proof that stress harms the body comes from the heart and blood vessels, the cardiovascular system. Chronic stress raises blood pressure. It feeds inflammation and the plaque buildup of atherosclerosis, a narrowing of the arteries. It is now known to be a risk factor for coronary heart disease.
Two heart doctors, Meyer Friedman and Ray Rosenman, first sharpened this link. They described the Type A personality: competitive, impatient, rushed, and quick to anger. They contrasted it with the more relaxed Type B. In their Western Collaborative Group Study, Type A men got coronary heart disease at about twice the rate of Type B men. That held even after the usual risk factors were counted. Still, smoking, blood pressure, and cholesterol stayed strong predictors in the same group of men.
Later research forced a sharper change. Several large studies that followed people over time could not find the overall Type A effect at all. So researchers broke the pattern into its parts. The part that reliably predicted heart risk was not ambition or busyness. It was hostility: chronic anger, cynicism, and mistrust. A hard-working leader who enjoys the work may be fine. The one who boils with anger at every red light is not.
Stress and immunity
The field of psychoneuroimmunology studies how the mind, the nervous system, and the immune system talk to one another. They talk all the time. Cortisol is useful in the moment. But when it stays high, it suppresses the immune system, which means it holds the body's defenses back. That is why people under chronic stress get sick more easily and heal more slowly.
Janice Kiecolt-Glaser showed this in a clever study. She studied people under chronic stress: family members caring for a relative with dementia. She made a tiny wound on each person's skin. The caregivers' wounds healed much more slowly than the wounds of similar people who were not caregivers.
Sheldon Cohen went further. He gave healthy volunteers the same dose of a cold virus. The more chronic stress a person reported, the more likely that person was to actually come down with a cold. This is direct proof that stress does more than make you feel worse. It lowers your defenses.
| System | Short-term stress | Cost of chronic stress |
|---|---|---|
| Heart & vessels | Faster heartbeat and more blood pumped to fuel action | High blood pressure (hypertension), inflammation, atherosclerosis, heart disease |
| Immune | A short boost of defenses | Weaker immunity, slower healing, more infections |
| Brain | Sharper focus and stronger memory for the moment | Weaker memory and lower mood; wear on the hippocampus |
| Metabolism | Sugar released for quick energy | Belly fat, insulin resistance, higher diabetes risk |
- Chronic stress raises blood pressure and drives the inflammation and atherosclerosis behind heart disease.
- Friedman & Rosenman's Type A pattern went with about twice the rate of heart disease in their own study. The overall effect did not replicate. The part that holds up is hostility, not busyness.
- Psychoneuroimmunology shows that cortisol suppresses immunity when it stays high.
- Kiecolt-Glaser (slow wound healing) and Cohen (catching colds) link stress to real illness.
Section 4Coping
Two ways to cope
Once we appraise a stressor, we do something about it. That is coping. Richard Lazarus and Susan Folkman drew the field's central line between two kinds.
Problem-focused coping goes after the stressor itself. You make a plan, look up information, ask for an extension, fix the leaking pipe, or have the hard conversation. Emotion-focused coping manages your reaction instead. You look at the situation in a new way, seek comfort, exercise, meditate, or simply let yourself grieve. Neither one is better in general. The trick is to match the strategy to the situation.
| Feature | Problem-focused coping | Emotion-focused coping |
|---|---|---|
| Target | The stressor itself | Your feelings about it |
| Best when | The situation is controllable | The situation is uncontrollable |
| Examples | Make a plan, study, negotiate, ask for advice | Reappraise, exercise, meditate, confide in someone, accept |
| Risk if overused | Wasted effort on what cannot be changed | Avoidance; the problem grows |
Matching coping to control, and what goes wrong
Here is the rule of thumb. When you can change the situation, lead with problem-focused coping. Sometimes you cannot change it, as with a terminal diagnosis, a loss, or a past you cannot undo. Then emotion-focused coping is not weakness. It is wisdom.
Trouble comes when the two are mismatched. It comes most of all when coping slides into avoidance. Denying a problem, numbing it with alcohol, or going over and over it in your head (rumination) all feel like coping in the moment. But they leave the stressor in place and often make it worse. Avoidant coping is one of the strongest predictors of stress becoming chronic.
Social support
Of all the shields against stress, none has more evidence behind it than other people. Social support is the comfort, help, and belonging we get from our relationships. Across hundreds of studies, it predicts better health and longer life. Some reviews find its effect on the risk of dying is about as large as the effect of quitting smoking.
Support works in several ways at once. The buffering hypothesis says support cushions the blow of stressors. It offers practical help, and it also makes an event feel less threatening in the first place. Psychologists name three kinds. Emotional support is a listening ear. Informational support is advice and guidance. Instrumental support is hands-on help, like a ride, a meal, or money. Even just believing that support is there lowers the stress response.
- Problem-focused coping targets the stressor. Emotion-focused coping targets your reaction (Lazarus & Folkman).
- Use problem-focused coping for controllable stressors and emotion-focused coping for uncontrollable ones.
- Avoidance (denial, substances, rumination) backfires and predicts chronic stress.
- Social support cushions stress and strongly predicts health and long life.
Section 5Health and well-being
Positive psychology
For most of its history, psychology studied what goes wrong. Around the year 2000, Martin Seligman and his colleagues launched positive psychology. It is the scientific study of what makes life worth living: strengths, meaning, flourishing, and the conditions that help people thrive instead of just getting by.
Seligman's earlier work on learned helplessness had shed light on depression. Learned helplessness is the giving up that follows stress you cannot control. He then turned to its opposite, learned optimism. Later he proposed PERMA as the parts of a flourishing life: Positive emotion, Engagement, Relationships, Meaning, and Accomplishment. The point is not to paint on a smile. It is to widen the field's question from "How do we fix illness?" to "How do people flourish?"
Happiness: what actually moves it
Happiness researchers such as Ed Diener study subjective well-being. That is a person's own rating of how satisfied they are with life, plus their balance of good and bad feelings.
One of the field's most humbling findings is hedonic adaptation, also called the hedonic treadmill. We get used to good luck and bad luck quickly. Lottery winners tend to drift back toward how happy they were before. The drift is strong but not always complete. Newer studies of big lottery wins find some lasting gain in life satisfaction. Adaptation to serious losses, such as a lasting disability, is often only partial. So hard life events can leave a real mark.
The level we drift back to is called a set point, and it is partly inherited. Twin studies put the heritability of subjective well-being at about 30 to 40%. Sonja Lyubomirsky and her colleagues once made popular a split that gave fixed shares of happiness to genes, to life circumstances, and to intentional activity, the things we choose to do. Its own authors have since formally rejected that split. It misused a statistic about groups and underrated how much circumstances matter. So no percentage split should be quoted. What holds up is the general message. Well-being has a real inherited part. We adapt to changes in our lives faster than we expect. And what we do is the part we can act on.
| Influence on happiness | What the evidence supports | What it means |
|---|---|---|
| Genetic set point | Real and large; twin heritability of well-being about 30 to 40% | An inherited baseline we tend to return to |
| Life circumstances | Matters more than the old pie chart suggested, but we adapt | Income, looks, where you live: the effect fades as it becomes normal |
| Intentional activity | Small but repeatable gains in trials of chosen habits | Gratitude, connection, exercise, purpose: the part we can act on |
Barbara Fredrickson's broaden-and-build theory explains why good feelings are worth building. Bad feelings narrow attention so we can deal with an emergency. Good feelings broaden our thinking. Over time they build lasting resources: relationships, skills, and resilience. Those keep paying off long after the good mood fades.
The habits that reliably nudge well-being up are plain but real. They include giving thanks, exercising, sleeping enough, savoring good moments, doing kind things for others, and investing in relationships.
Building resilience
Resilience is the ability to adapt and bounce back when life is hard. It is far more common than we assume. Ann Masten studied children who did well despite hardship. She famously called resilience "ordinary magic." It comes not from rare gifts but from ordinary human resources. These include a caring relationship, a sense of being capable, and the ability to manage emotions.
Suzanne Kobasa described a resilient attitude she called hardiness. It rests on three C's. Commitment means taking part in life instead of pulling away. Control means believing you can affect what happens. Challenge means seeing change as a chance to grow, not as a threat.
Many people who live through serious hardship even report post-traumatic growth. They describe deeper relationships, new priorities, and a greater sense of strength. Resilience is not the absence of stress. It is what lets people meet stress and come through it whole.
- Positive psychology (Seligman) studies flourishing. PERMA names its parts.
- Hedonic adaptation pulls us back toward a partly inherited set point. Circumstances matter less than we expect.
- Intentional activity, such as gratitude, connection, exercise, and purpose, is the part of happiness we can act on.
- Resilience is common and can be built. Kobasa's hardiness rests on commitment, control, and challenge.
The chapter in one breath
- Stress is a process. It has a stressor (the demand), your appraisal of it, and the stress response it sets off.
- Lazarus showed that stress depends on primary appraisal (Is it a threat?) and secondary appraisal (Can I cope?). The same event can be a threat or a challenge.
- The fight-or-flight response (Cannon) fires the sympathetic system and adrenaline. Selye's GAS runs alarm → resistance → exhaustion.
- The slow HPA axis releases cortisol. Cortisol protects in short bursts but builds allostatic load when stress is chronic.
- Chronic stress harms the heart (hostility, atherosclerosis, heart disease) and the immune system (Kiecolt-Glaser, Cohen).
- Problem-focused coping suits stressors you can control. Emotion-focused coping suits ones you cannot. Avoidance backfires.
- Social support strongly cushions stress. Positive psychology shows that happiness and resilience can be built on purpose.
ReferenceWords worth knowing
Here are the key terms from this chapter. Skim them now, or come back whenever a word trips you up.
- Allostatic load
- The built-up wear and tear on the body when the stress response turns on again and again, or stays on.
- Appraisal
- The mind's judgment of a situation. It decides whether, and how much, the situation feels stressful.
- Coping
- What we think and do to handle a stressor and the feelings it brings.
- Cortisol
- The main stress hormone. The adrenal cortex releases it through the HPA axis. It helps in short bursts and harms when it stays high.
- Emotion-focused coping
- Coping that manages your feelings about a stressor. It fits best when you cannot change the situation.
- Eustress
- Good, motivating stress that comes from a challenge you feel able to meet.
- Fight-or-flight response
- Walter Cannon's name for the fast surge of the sympathetic nervous system that gets the body ready to face a threat or run from it.
- General adaptation syndrome (GAS)
- Selye's three-stage model of how the body responds to long-lasting stress: alarm, resistance, exhaustion.
- Hardiness
- Kobasa's resilient attitude, built on commitment, control, and challenge.
- Hedonic adaptation
- The pull back toward a usual level of happiness after good or bad events; the "hedonic treadmill."
- HPA axis
- The hypothalamus-pituitary-adrenal pathway that releases cortisol. It is the slow, long-lasting arm of the stress response.
- Positive psychology
- The scientific study of strengths, well-being, and the conditions that help people flourish.
- Primary appraisal
- The first judgment of a situation: Is it a threat, a challenge, or not important?
- Problem-focused coping
- Coping that acts on the stressor itself. It fits best when you can change the situation.
- Psychoneuroimmunology
- The study of how mental states, the nervous system, and the immune system affect each other.
- Resilience
- The ability to adapt and bounce back when life is hard.
- Secondary appraisal
- The judgment of whether you have the resources to cope with a stressor.
- Social support
- The comfort, advice, and hands-on help that come from your relationships. It cushions stress.
- Stress
- The process of noticing and responding to events we judge as threatening or challenging.
- Stressor
- An event or demand that can set off a stress response.
- Type A
- Friedman and Rosenman's competitive, impatient, hostile pattern, first linked to heart disease. The overall pattern did not replicate. Hostility is the part that does predict heart risk.