How stress works
Stress is your body gearing up to meet a demand. Learn what happens inside you, why short bursts help but long ones wear you down, and how to match your coping to the problem.
INSIDE YOU
The stress response in two waves
Within seconds, your sympathetic nervous system releases adrenaline: heart and breathing speed up, muscles tense, sugar is released for energy and digestion slows. Over the next minutes, a slower hormone chain releases cortisol, which keeps energy available for longer. This is the famous "fight or flight" response. It evolved for physical danger, but it fires just as readily for an angry email.
A near-miss on the motorway: your heart pounds instantly (adrenaline), and you still feel shaky and on edge half an hour later (the slower wave winding down).
Stress (as psychologists use it)
In the influential model of Richard Lazarus and Susan Folkman, you feel stressed when a situation seems to make demands that exceed your resources: your time, skills, money, energy or support. So stress depends on two readings: "how big is this?" and "can I handle it?" Change either and the stress changes.
Two people get the same last-minute report. One has done ten like it and a colleague to help. The other has never written one and is alone. Same demand, very different stress.
Check yourself
Ali has a statistics exam in ten days. He keeps thinking, "I have no idea how to even start revising for this," and his stress is climbing. Using the demands-vs-resources idea, what's the most useful first move?
- Tell himself the exam isn't really important, so he can stop caring
- Build resources: ask the tutor what matters and plan short sessions
- Wait until closer to the date, when the pressure will force him to focus
- Accept that some people just aren't cut out for statistics at all
Show the answer
Build resources: ask the tutor what matters and plan short sessions
Yes. Ali's stress comes mainly from "can I handle it?" A clear plan and some guidance raise his resources, so the same exam feels more manageable.
Short bursts vs always on
Acute stress
Short and followed by recovery. A presentation, a near-miss, a tough match. It can sharpen attention and energy, and the body settles afterwards. This is the system working as designed.
Chronic stress
Switched on for weeks or months with little recovery: money worries, caring for a sick relative, a toxic job. Over time it's linked with poor sleep, low mood, getting ill more easily and a higher risk of health problems such as heart disease.
Signs stress has been on too long
- Trouble falling or staying asleep, or waking up already tired.
- Snapping at people over small things; everything feels like too much.
- Headaches, tight shoulders, stomach trouble, catching every cold.
- Leaning harder on caffeine, sugar, cigarettes, alcohol or endless scrolling to get through the day.
- Pulling away from friends and things you used to enjoy.
Check yourself
Acute or chronic stress?
- A racing heart before a football penalty
- Months of worrying about paying rent
- Two years of caring alone for a parent with dementia
- A sharp jolt when your phone slips towards the edge of the balcony
- A job where you dread every morning, with no end in sight
- Nerves in the hour before a job interview
Show the answer
Acute: A racing heart before a football penalty, A sharp jolt when your phone slips towards the edge of the balcony, Nerves in the hour before a job interview
Chronic: Months of worrying about paying rent, Two years of caring alone for a parent with dementia, A job where you dread every morning, with no end in sight
STRESS CAN HELP
Some arousal sharpens you
An old idea in psychology, often simplified as the Yerkes–Dodson curve, says performance tends to improve with arousal up to a point, then drops when arousal gets too high, especially on complex tasks. More recent studies by Jeremy Jamieson and others suggest that reading your racing heart as your body preparing, rather than as a sign of failure, can help people perform better under pressure.
Before a talk, "my heart is pounding, I'm going to fall apart" and "my heart is pounding, my body is getting ready" describe the same body. The second tends to be more useful.
Check yourself
Before her driving test, Parisa notices her heart racing. Instead of trying to force herself to be completely calm, she tells herself, "This is my body getting ready to focus." Research suggests this kind of rethinking can help.
Show the answer
True
True. Forcing total calm rarely works, because the body can't simply be told to stop. Studies on stress reappraisal suggest that seeing arousal as fuel rather than a threat can improve how people feel and perform under pressure. It won't erase nerves, and it isn't meant to.
Two kinds of coping
Problem-focused
Change the situation. Make a plan, ask for help, have the difficult conversation, cut a commitment. Best when there's something you can actually change.
Emotion-focused
Look after yourself inside it. Talk to someone you trust, exercise, calm your body, put things in perspective. Best when the situation is out of your hands, like waiting for results or a loved one's illness.
Check yourself
Babak's father is in hospital after an operation, and the doctors say the next few days will tell. Babak can't sleep and keeps searching his father's condition online at 2am. What fits the situation best?
- Research harder until he finds a way to control how his father recovers
- Push all the feelings away until his father is completely out of hospital
- Keep reading every forum post about the operation, just in case it helps
- Use emotion-focused coping: talk to his sister, walk, rest
Show the answer
Use emotion-focused coping: talk to his sister, walk, rest
Right. The outcome isn't in Babak's hands, so problem-solving at 2am just feeds worry. Support, movement and rest help him get through the wait and be there for his father.
Check yourself
Match each stressor to the kind of coping that fits it first
Show the answer
- Too many tasks and a manager who doesn't know → Tell the manager and agree what to drop
- Waiting three weeks for university admission results → Keep busy, exercise and talk it through
- A noisy neighbour every night at midnight → Have a calm word with the neighbour
- Grief after a friend's death → Lean on people close to you and let it be sad
Lesson recap
- The stress response comes in two waves: adrenaline in seconds, cortisol over minutes.
- You feel stressed when demands seem bigger than your resources; raising resources lowers stress.
- Short bursts can sharpen you; stress that stays on for weeks without recovery wears you down.
- Change what you can (problem-focused); look after yourself through what you can't (emotion-focused).
- Weeks of high stress that disrupts your life is a reason to see a professional.