What Is Stress? How It Affects Your Body and What Actually Helps

Your heart speeds up before a job interview. Your shoulders creep toward your ears in traffic. Your mind replays an argument at midnight. That's stress, and every single one of us knows it from the inside.

Stress isn't the enemy, though. It's an alarm system. The trouble starts when the alarm never switches off.

What happens in your body when you're stressed

When your brain spots a threat, real or imagined, it triggers what's often called the fight-or-flight response. Your adrenal glands release hormones including adrenaline and cortisol. Your heart beats faster, your breathing quickens, your muscles tense and your body pushes sugar into your blood for quick energy.

That's brilliant if you need to jump out of the way of a car. It's less helpful when the "threat" is an inbox with 214 unread emails, because your body reacts in much the same way.

Short-term stress vs. chronic stress

Short-term (acute) stress comes and goes. A deadline, a tough conversation, a near miss on the highway. Your body ramps up, then settles back down. In small doses this kind of stress can even sharpen your focus.

Chronic stress is the alarm stuck in the "on" position for weeks or months. Money worries, caring for a sick family member, a job you dread, a relationship that's falling apart. Your body never gets the signal that it's safe to stand down.

How chronic stress can show up

The American Psychological Association and other health bodies link long-term stress to a whole range of problems. You might notice:

• headaches or tight, sore muscles
• trouble falling asleep or staying asleep
• an upset stomach or changes in appetite
• feeling irritable, anxious or flat
• getting sick more often
• leaning harder on alcohol, caffeine or junk food

Over time, chronic stress is also associated with high blood pressure and heart disease. That doesn't mean stress alone causes them, but it's one more reason not to just "push through" for years.

What actually helps

There's no magic trick here, and anyone selling one is selling something. These are the habits with solid backing, and you don't need all of them.

Move your body

Exercise burns off some of that stress chemistry and improves sleep. You don't need a gym. A brisk 20-minute walk counts, and so does dancing in your kitchen.

Slow your breathing

Slow, steady breathing tells your nervous system it can relax. Try box breathing: breathe in for 4 counts, hold for 4, breathe out for 4, hold for 4. Repeat a few rounds.

Protect your sleep

Stress wrecks sleep, and bad sleep makes stress feel bigger. Keep a regular bedtime, put your phone across the room and give yourself 30 minutes to wind down.

Talk to someone

Saying "I'm overwhelmed" out loud to a friend you trust takes some of the pressure off. Connection is one of the strongest buffers against stress we know of.

Name what you can control

Write the stressor down, then split it into two lists: what you can do something about, and what you can't. Put your energy into the first list. Let the second one be heavy without trying to fix it tonight.

Cut back on the quick fixes

That extra glass of wine or third coffee can feel like relief in the moment. Both can make sleep and anxiety worse.

When to get help

If stress is affecting your work, your relationships or your sleep for more than a couple of weeks, talk to your doctor or a licensed therapist. Therapy approaches like cognitive behavioral therapy (CBT) have strong evidence for helping people manage stress and anxiety.

The takeaway

Stress is your body trying to protect you. You can't delete it from life, and you wouldn't want to. But you can help the alarm switch off more often, and those small, boring habits really do add up.

Curious which part of your life is adding the most pressure? Our wellness wheel quiz can help you spot it.