Motion and Emotion

Your brain on movement, and why exercise helps

What moving does for your mood, how it eases anxiety and stress, why it helps and why it probably isn’t endorphins, how much is enough and how hard to go, why starting is so hard and what makes it easier, when exercise isn’t the answer, and why your therapist (aka me) keeps bringing it up

Written by Ivana, psychologist and psychotherapist

24 minute read  ·  5,367 words

Someone has probably told you to exercise more. A doctor, a friend, an article, usually on exactly the kind of day when getting off the couch felt like the biggest thing you’d do all week. And on a better day, you may have noticed that a walk left you a little lighter than when you set out. Both of those can be true at once.

Moving your body really can help with low mood, anxiety, stress and sleep, and the research behind that is stronger now than it has ever been. But “just exercise” leaves out almost everything that matters: how much, how hard, what kind, why it’s so hard to start when you’re struggling, and the times when it isn’t the right advice at all.

You don’t need to be sporty for any of this! Most of the research is about ordinary movement: walking, yoga, lifting weights, dancing. And if you’re reading this on a day when even that sounds impossible, part seven was written with you in mind.

What the research says now

If you’ve been feeling low for a while, you’ve probably wondered whether exercise would actually help, or whether it’s just one of those things people say. It’s a fair question, and it has a better answer now than it used to.

In 2026, Cochrane, an independent group that brings together the trials on a question and weighs them, updated its review of exercise for depression. Drawing on 73 trials, it found that exercise reduced symptoms of depression by a moderate amount compared with no treatment (pretty cool). A second large review, of 218 trials, found much the same.

It didn’t always look this good. When the same Cochrane review looked only at the most carefully run trials back in 2013, the benefit almost disappeared. Thirteen years and dozens of trials later, the best-run trials show a real, if smaller, benefit.

About as good as therapy, in the trials that compared them

In the trials that put exercise head to head with talking therapy, the two did about as well as each other. In the few, small trials that compared it with antidepressants, they also came out about the same.

Exercise isn’t better than either one, and it won’t replace them for everyone. But it deserves to be taken seriously as a treatment, and not just handed out as a tip.

One well-known trial in the US gives a feel for it. After four months, about four in ten people with depression had recovered with exercise, much the same as with an antidepressant. But three in ten recovered on a placebo pillplacebo pillA dummy pill with no medicine in it. Trials use one to see how much of an improvement comes from the treatment itself, and how much from everything else, like attention and hope., with the same check-ins and the same hope of getting better. So part of the benefit comes from things all the groups shared: attention, a plan, and the expectation that something would help.

Where exercise fits

Guidelines are more careful than the headlines. The World Health Organization’s guide for health workers treating depression lists being active alongside keeping regular sleep times, eating regularly and seeing people you trust, as things that can help lift mood.

In the UK, NICE lists a group exercise program, run by a trained instructor, as one of the treatments that can come first for milder depression, ranked above antidepressants. In Canada, supervised exercise is a first choice for mild depression and a second-choice add-on for moderate depression. For more severe depression, guidelines put other treatments first, and treat exercise as something to add alongside them.

If you’re taking medication or seeing a therapist, adding movement is a good idea, and you don’t have to choose between them. Please don’t stop a medicine to try exercise instead without talking to your doctor first.

Can it stop depression starting?

This is harder to test, because nobody can assign people at random to be active for twenty years. What researchers can do is follow large groups of people over time. When they do, more active people are less likely to develop depression later, and most of the difference appears between doing nothing and doing a little. A study that measured activity with trackers and looked at people’s genes points the same way.

Some careful studies find that part of the link comes from other things, like family background. So the link is probably real, but smaller than it first looks.

If low mood has reached the point of thinking about ending your life, please tell someone today rather than waiting to see whether a walk helps. Our article on suicidal thoughts explains what helps, and our helplines page has the crisis lines and emergency numbers for your country.

A little calmer, within half an hour

If you’ve ever gone for a walk to clear your head after a stressful phone call and come back feeling slightly more like yourself, you’ve felt something researchers have measured in more than a hundred studies. On average, people feel a bit less anxious within half an hour of a single session of exercise.

It’s a small effect on how you feel in the moment, not a cure. But it’s often the first thing people notice, and it can be enough to get you through a difficult afternoon.

Over weeks, anxiety itself can ease

Done regularly, exercise does more than take the edge off a bad day. The largest recent summary, which pooled dozens of earlier reviews, found a moderate drop in anxiety symptoms, and gentler, shorter programs seemed to work at least as well as hard ones. The benefit also shows up in people with a diagnosed anxiety disorder, although the trials there are fewer and smaller.

In 2023 the World Health Organization added a recommendation that structured exercise should be considered for adults with generalized anxiety disorder or panic disorder. It’s a cautious recommendation, based on limited evidence, and it sits alongside therapy rather than replacing it. For panic in particular, a trial that compared them found cognitive behavioral therapy, a structured talking therapy, worked better than exercise on its own, and another found exercise added a little on top of therapy.

When your heartbeat is the scary part

For some people, the hardest thing about exercise is how it feels. A pounding heart, fast breathing and sweating are the same sensations that come with panic, so a run can feel like the start of an attack. If that’s you, no wonder you’ve avoided it.

In small trials, a couple of weeks of regular exercise made people noticeably less afraid of those sensations. Your body gets to feel a racing heart again and again in a setting where nothing bad happens, and slowly stops treating it as a warning. Therapists treating panic use the same idea on purpose. Harder sessions seemed to do it faster, but that’s something to build toward, not to start with.

Our article on hypermobility has more on how the same heartbeat can mean very different things, depending on how you read it.

Stress, and a body that settles faster

Stress is a whole-body response, and our article on stress explains how it works. Exercise seems to soften it.

In one German trial, men who trained for twelve weeks reacted less strongly to a stressful public-speaking test afterward, with smaller rises in stress hormones and heart rate, than men who hadn’t trained. Fitter people also tend to have hearts that settle down faster after stress, although not every study finds this.

Sleep improves, especially for those sleeping worst

Sleep and mood are tangled up together, so it’s no surprise that sleep is one of the places exercise helps. Regular exercise helps people sleep better, and the clearest change is in how rested they feel, more than in how many extra minutes a tracker records.

A 2026 review of 200 trials found that the people sleeping worst had the most to gain, while good sleepers gained little, although the certainty of that evidence is very low. Our article on sleep covers the rest of what helps, and regular physical activity is on its list.

It takes weeks, not one night

This is where a lot of people give up too soon. In a small study of women with insomnia, a workout didn’t improve that night’s sleep. Their sleep got better over sixteen weeks, and a bad night tended to mean a shorter workout the next day, not the other way around. In another trial, reaching the standard 150 minutes a week eased insomnia and lifted mood, but it took six months.

So if you’ve tried it for a week and slept no better, that’s normal, and it isn’t a sign it won’t work for you.

If you’ve had insomnia for months, the treatment with the best evidence is a specific talking therapy for insomnia, called CBT-I. European sleep experts see exercise as a useful extra alongside it, not instead of it.

The evening exercise myth

You’ve probably heard that exercising in the evening will keep you awake. For most people, it doesn’t. Reviews of the research find that evening exercise doesn’t harm sleep in healthy adults, and the US physical activity guidelines say that how long before bed you exercise doesn’t seem to matter.

There’s one exception. A hard workout that ends within about an hour of bedtime may make it harder to fall asleep, and in wearable data from millions of nights, very hard sessions late in the evening went with slightly shorter sleep. Finishing four or more hours before bed, or keeping late sessions easy, seemed to avoid it.

It’s probably not endorphins

The explanation you’ve most likely heard is endorphins, the body’s own opioids. The evidence for it turns out to be surprisingly thin.

In a German trial, people ran for 45 minutes after taking a medicine that blocks the body’s opioids. They still felt the lift, and they still felt less anxious afterward. And endorphins in the blood don’t seem to have much effect on the brain. Opioids are released inside the brain when trained runners go for long runs, so they may play some part, but they don’t seem to be the reason.

A more likely candidate is a group of the body’s own cannabis-like chemicals, called endocannabinoids, which rise with exercise and can reach the brain. So far, though, their role has only been proven in mice. And a runner’s high isn’t guaranteed. You don’t need one to feel better.

Brain growth, mostly in mice

You may also have read that exercise grows new brain cells. In mice, running does, in the hippocampus, a part of the brain involved in memory and mood. In people, scientists still disagree about whether adults grow new cells there at all, and in a trial of adults with depression, three months of exercise didn’t make the hippocampus any bigger.

A protein that helps brain cells grow, called BDNF, does rise after each workout. But in the one trial that tested it in people with depression, it didn’t explain who got better.

What probably helps: a break, a win and a lift

The explanations with the most support are less dramatic, and more about your mind.

A break from going around in circles. In a 2026 study, people with depression spent less of a half-hour exercise session stuck in brooding thoughts than they did sitting still. That fits our article on overthinking, which found that distraction is better than its reputation, at least for the next hour.

A sense that you can do things. When depression insists you can’t manage anything, finishing a walk is a small piece of evidence against it. Studies have linked feeling more able to cope with feeling less depressed, although they can’t yet show which comes first.

Small lifts in good feelings. In a study that checked in with people eight times a day for a week, people with depression felt more positive after being active, even though it didn’t reduce their bad feelings. Better sleep, time outside and time with other people may add to it too.

And expectation is part of it. In the few trials that tested it, believing exercise would help seemed to account for about half of the benefit people felt. That doesn’t make the benefit any less real. It just means your mind is part of the treatment too.

Nobody knows exactly why exercise helps, and it’s unlikely to be one thing. You don’t need to know how it works for it to work for you!

What the guidelines say

The World Health Organization recommends that adults get 150 to 300 minutes a week of moderate activity, like brisk walking, or 75 to 150 minutes of vigorous activity, like running, plus strength exercises on two or more days. The UK and US guidelines say much the same, and Australia’s 2026 guidelines ask for 30 minutes or more on most days.

If that sounds like a lot, the same guidelines also say that some activity is better than none, and that all of it counts. There’s no longer a rule that it has to come in ten-minute blocks. A few flights of stairs, the walk to the store and ten minutes of dancing in the kitchen all count toward the total.

The biggest difference is at the start

When researchers pooled studies that followed nearly 200,000 people for years, the drop in depression risk was steepest right at the beginning. About half the recommended amount, roughly an hour and a quarter of brisk walking a week, was linked to most of the drop seen at the full amount. Going beyond it added little.

Studies that counted steps with trackers point the same way. Around 7,000 steps a day was linked to a lower risk of depressive symptoms, which is a lot more reachable than the famous 10,000.

These studies follow people rather than test anything, so they can’t prove the walking caused it. But they keep pointing in the same direction: the step from nothing to something is the big one.

How hard should it feel?

In trials for depression, harder exercise tended to help a bit more. But gentle movement, like walking or gentle yoga, still clearly helped. And in one small study of women with depression, a single easy half-hour on an exercise bike lifted their mood just as much as a hard one.

There’s a catch with pushing hard, too. Most people enjoy exercise below the point where their breathing changes and talking starts to get difficult. Above that point, almost everyone finds it unpleasant. And how exercise feels while you’re doing it is one of the better predictors of whether people keep it up. The glow afterward, on its own, doesn’t seem to be enough.

So it doesn’t have to hurt to work! If you’d like to go harder, build up to it over weeks, and let yourself set the pace.

The most studied: walking, strength and yoga

If you like having a starting point, the kinds of movement with the most research behind them for depression are walking or jogging, strength training and yoga. All three helped by a moderate amount in the big comparison of 218 trials. Walking seems to help whether it’s indoors or outdoors, alone or in a group, short or long.

Strength training deserves a special mention. It helped with depression even in people who didn’t get noticeably stronger, and along with yoga, it was the kind people were least likely to drop out of.

Yoga counts too, if you’ve ever wondered. The trials used yoga with real movement in it, not only breathing or meditation.

Dance, tai chi and team sports

Dance came out on top in that big comparison, but that result rests on five small trials, mostly with young women, so it’s promising rather than proven. Tai chi and qigong, the slow, flowing movement practices from China, helped too, and in a review that compared tai chi with ordinary exercise, it did slightly better for anxiety and low mood.

Team sports come with their own extra: other people. People who play in a team or a club tend to report better mental health than people who exercise alone, probably partly because of the belonging that comes with it, although most of that research can’t prove cause.

Outside, if you can

Moving outdoors may add something. In trials of outdoor activities such as group walks in green spaces, low mood improved by a moderate amount. In one small study, a 90-minute walk in nature reduced brooding thoughts, while a city walk didn’t. The UK’s depression guideline even notes that the benefit of activity may be greater outdoors.

With others, or on your own

In research on depression, exercising in a group, or with someone guiding you, shows bigger effects than exercising alone and unsupervised. A guided group program is also what the UK guideline recommends. But the largest comparison of depression trials found group and solo exercise worked about the same overall, so if groups aren’t for you, going alone still works.

The World Health Organization found no good evidence that one type of activity beats another for health overall. So choose by what you enjoy, what you can get to, and what fits into your week.

The trap

This is the cruel part. When researchers asked people with serious mental health problems what stopped them exercising, the most common answers were low mood and stress, the very things they hoped exercise would help. It isn’t laziness!!

Depression drains energy and the belief that anything will help, and stress eats the time and headspace you’d need to plan it. Our article on dopamine describes the same thing: when people are overwhelmed, the habits that usually help them cope get harder to reach.

So if you haven’t managed it, you haven’t failed at something easy. Starting while you’re low or stressed is hard, so the plan has to fit the week you’re actually having.

When your body is the thing you’re dreading

For many people, the hardest part isn’t the movement, it’s being seen. If comments about your weight or your body have made gyms or sports feel unsafe, of course you’d want to stay away. Studies of weight stigma find that people who have been on the receiving end are more likely to want to avoid exercise, whatever their size.

Those studies found something else, too. The comments do the most damage when people come to believe them about themselves. If you’ve started saying those things to yourself, that’s worth working on, and therapy can help. In the meantime, you don’t need a gym at all.

How fast you go matters as well. In one small experiment, heavier women enjoyed a walk at their own pace as much as anyone, but when the pace was pushed just 10% faster, their enjoyment dropped. Set your own pace, not the class’s.

What makes it easier to start, and to keep going

The good news is that there’s solid research on how people build movement into their lives, and most of it is about making it easier, not about trying harder.

Starting small isn’t cheating. When researchers looked at what kept inactive adults moving six months later, starting small and building up, a concrete plan, reminders, and rewarding yourself were among the things that made the difference.

Plans that spell out “when this happens, I’ll do that” give a small but real boost, especially when they include a plan B for the day it rains. Our article on if-then plans shows how to make one. Tying movement to something you already do, like a walk after lunch, gives the habit a cue. And missing a day doesn’t reset anything. Our article on habits explains why being consistent over the weeks matters more than a perfect streak.

Having someone on your side matters more than people expect. In trials for depression, about four in five people stuck with their exercise program, and those supported by a physical therapist or an exercise physiologist were more likely to stay. Even a friend who checks in helps: in one review, exercising at home with someone in touch beat exercising at home with no contact at all.

Encouragement on its own isn’t always enough, though. In a UK trial, phone calls and a few meetings to encourage people with depression to be more active got them moving more, but didn’t lift their depression. The trials that worked mostly gave people a real program, often a supervised one. If you can get one, through your doctor, a gym with trainers, or a local class, it’s worth taking.

When “just exercise” is the wrong advice

Most of this article assumes that more movement is good for you. For some people, at some times, it isn’t, and being told to exercise can feel like being told your problem isn’t real. If any of the situations below sound like you, the right plan looks different.

If you’re very depressed

When depression is severe, getting out of bed can be the whole day’s effort, and a plan to run three times a week can turn into one more thing to fail at. Guidelines put other treatments first for severe depression, and treat exercise as something to add once things are moving. If you’re in that place, the most useful next step is talking to a doctor or a therapist.

If neither is within reach right now, because of cost, a waiting list or where you live, a peer support group or a free online program can be a start, and you can find the crisis lines and emergency numbers for your country on our helplines page. And if you’re thinking about ending your life, please tell someone today, and call your local emergency number if you’re in danger now.

If activity makes you crash a day or two later

Some people feel fine while they’re active and then much worse a day or two later, with symptoms that can last days or weeks. This is called post-exertional malaise. It’s the core feature of ME/CFS, sometimes called chronic fatigue syndrome, and it also happens in some people with long COVID.

If that’s you, pushing through makes it worse. The World Health Organization’s guidance on long COVID and NICE’s guideline on ME/CFS in the UK both advise against graded exercise, where activity goes up by a fixed amount each week, for people who crash this way, and the US CDC warns that ordinary exercise advice can harm people with ME/CFS. What they recommend instead is pacing: learning your limits and staying inside them, ideally with help from a team that knows the condition. Please don’t let anyone, this article included, talk you into doing more.

If exercise has become a rule you can’t break

For some people, exercise stops being something that helps and becomes something they have to do. Warning signs include feeling that you have to exercise to “earn” food, feeling guilty or anxious when you miss a session, and exercising through injury. Compulsive exercise is especially common alongside eating disorders: in one inpatient program, nearly half the people being treated for an eating disorder were exercising compulsively.

If this sounds familiar, it’s worth talking to a doctor or an eating disorder service, even if you don’t think your eating is a problem. It also helps to notice why you move. Exercising to change how your body looks, or because you feel you have to, tends to go with feeling worse about it, while moving for enjoyment or health tends to go with feeling better.

If your body needs a different plan

If you live with pain, hypermobility or a long-term health condition, movement usually still helps, but the kind and the pace matter more.

For chronic pain, exercise tends to help a little with pain and daily life, and it rarely causes harm. Some muscle soreness in the first weeks is common and usually settles.

For hypermobility, specialists advise starting low and going slow: light strength and control work, built up gradually, ideally with a physical therapist, and avoiding high-impact and contact sports if your joints are unstable. Our hypermobility article explains how fear of movement builds up, and how to tell a movement that’s unsafe from one that has only come to feel dangerous.

If you’re pregnant or have just had a baby, the World Health Organization recommends staying active throughout, unless there’s a medical reason not to, and exercise during pregnancy is linked to less depression during pregnancy. After 65, it adds balance and strength work on three or more days a week, which also helps prevent falls. For children and teenagers, it recommends an average of an hour a day, and in trials activity eased teenagers’ low mood a little, most clearly in those who were already struggling.

Around menopause, exercise helps with low mood, but it hasn’t been shown to reduce hot flashes. Our article on perimenopause and mood has more.

Do you need a doctor’s okay first?

Usually not! Guidelines say most people don’t need a medical check before starting light or moderate activity, up to about the level of brisk walking, and that building up gradually carries very little risk.

If you have a known heart, kidney or metabolic condition such as diabetes, check with your doctor first, especially before anything vigorous. And if you notice new symptoms as you do more, such as chest pain or unusual breathlessness, stop and get them checked.

Why your therapist keeps bringing it up (aka me)

Yes, I’m the one who keeps asking whether you’ve been outside this week. By now some of my clients could probably say it along with me. I know how it can sound. I don’t think a walk will fix what brought you in, and I’m not brushing off what you’re going through.

I keep asking because movement has good research behind it, and you can do it on your own, between sessions, usually for free. On the days you manage even a little, anxiety often eases, sleep comes a bit easier and your mood can lift. Those are a lot of the things people come to therapy hoping for.

So the question is smaller than it sounds. What could the tiniest version look like for you this week? Maybe one walk around the block, or a few minutes of stretching on the living room floor. And if the honest answer right now is “nothing,” that’s okay to tell me. It’s useful to know, and we can start from there.

A place to start

You don’t have to become a different kind of person to get the benefit of any of this. A short walk counts. A slow one counts. So does the class you only went to because a friend dragged you along.

What the research keeps pointing to is small, regular and something you don’t hate. And on the days when even that is too much, don’t beat yourself up. Make it smaller. Tomorrow, the walk to the end of the street is a perfectly good start.