Every step counts, even the unremarkable ones

Think about how many steps you took yesterday.

Unless you wear a tracker, you probably have no idea. Most of them were forgettable: to the kettle, to the door, to the bus stop, to the other room because you’d forgotten why you went in. Nobody has ever described a Tuesday as “the day I did 6,000 steps.”

Yet a study published this month in JAMA Network Open suggests those unremarkable steps might be worth a second look.

What the researchers did

A team led by Qingyang Li and Divyangana Rakesh at King’s College London, working with Amanda Paluch of the University of Massachusetts Amherst, used data from the Adolescent Brain Cognitive Development (ABCD) Study, a long-running US study that follows young people across 21 sites.

The sample was 5,515 young people, with an average age of around 12. For about three weeks they wore a step-counting device, so the researchers had a picture of their ordinary daily movement rather than a guess. A year later, the young people and their parents completed a standard questionnaire about emotional and behavioural wellbeing. The team also looked at brain-imaging data.

What they found

Young people who took more steps a day reported fewer emotional and behavioural difficulties a year later. The pattern was gradual rather than a cliff-edge. Those averaging under 5,000 steps a day reported the most difficulties; those around 8,000 reported fewer; and those at 12,000 or more reported the fewest. The link held after the researchers accounted for how the young people were doing at the start.

The researchers also reported that more steps were linked with slightly thicker tissue in two brain regions involved in movement and in managing emotions, and that this partly accounted for the link with later wellbeing. Smaller increases mattered in the data too: a rise of 1,000 to 2,000 steps a day, from any starting point, was associated with a more favourable picture. The researchers found no link between step count and school performance.

The honest caveats

This is the part we never want to skip.

It’s an observational study, so it shows an association, not cause and effect. It can’t tell us that walking more produces better wellbeing. It’s quite possible that it runs the other way in part: feeling steadier makes it easier to get out and move. Things the study couldn’t fully capture, like sleep, friendships, screen time or how safe a neighbourhood feels for walking, could also sit behind both.

The brain differences were small. Very few participants took very high step counts, so we can’t say what happens beyond the range measured. Most were in early adolescence, so we shouldn’t assume the same picture holds for older teens or adults. And step counts miss swimming, cycling and strength work.

So: an interesting, carefully done signal. Not a prescription.

Nagi’s take

What stays with us isn’t the number. It’s how ordinary the thing being measured is.

There was no programme, no goal, no special session. Just the everyday amount of moving around that a day happened to contain. And in these data, more of it travelled alongside feeling steadier, whatever the starting point.

We hear a lot about movement as a thing you schedule: the run, the class, the new routine. For plenty of people, a day that’s already heavy, those can feel like one more thing to fail at. A study like this is a gentle counterweight. Small and unglamorous counts. A walk round the block, the longer route to the shop, standing up when you’d normally stay put.

It’s also a reminder that movement, mood, sleep and energy don’t live in separate boxes. That’s part of why Nagi’s check-in is four taps: mood, sleep, energy, and a moment to notice how you are. Over a few weeks, some people spot their own patterns, like the days after a walk feeling a little different from the days after none. Nagi doesn’t tell you what any of it means, and it can’t promise that moving more will change how you feel. It simply holds the record steady, in a calm space that’s just yours, with no name and no email, so you can look for yourself.

The bit we’d underline

You don’t have to turn your life into a fitness plan. If a day is heavy, a few extra minutes outside is enough to count, and a day with none isn’t a failure. On the evidence here, the small, ordinary stuff is where the pattern lives.

If you want a private place to start noticing your own patterns, Nagi is on Google Play and the App Store — or in your browser at app.nagiandme.app. The first 15 messages are free. No name, no email. Just you, checking in.

— The Nagi team

Source: Li, Q., Paluch, A., & Rakesh, D. (2026). Physical Activity and Adolescent Brain Structure, Mental Health, and Academic Outcomes. JAMA Network Open, e2636973. DOI: 10.1001/jamanetworkopen.2026.36973. Reported by News-Medical, 1 October 2026.

Nagi & Me is a mental health companion app, not a medical device, and nothing here is medical advice. If you’re struggling, please reach out to a professional or someone you trust.