By Sam Carey, Founder of Run Love Sprint.
I've written before about what the research says about parkrun, but a new editorial in the Journal of Mental Health sent me back to the studies, and this time it was the parts that have nothing to do with running that stayed with me. The volunteers, the people who stop coming after one visit, and the question of who parkrun reaches in the first place say a lot about why running with other people matters, and about what any running community needs to get right.
A free 5K worth hundreds of millions
The editorial, Exercise and life satisfaction: the case of parkrun (opens in a new tab) by Martin Guha, brings together a decade of research on the weekly 5K that began in 2004 as a time trial in Bushy Park with thirteen runners. Its starting point is one most of us would agree with: moderate exercise is good for body and mind, being outdoors in green space helps, and doing it alongside other people seems to help even more.
The most striking numbers come from a 2025 study by Steve Haake, Andy Hext and colleagues at Sheffield Hallam University (opens in a new tab), which surveyed UK parkrunners in autumn 2024 and received more than 78,000 responses. Using an approach set out in Treasury guidance, which puts a financial value on changes in life satisfaction, they estimated that parkrun was worth around £668 million to the UK in a year, against running costs of about £12.5 million. The biggest part of that figure comes from improvements in people's health, which the authors base on an assumption from their earlier research, so it's an estimate rather than a measured result. But even the parts they measured directly, the extra activity people do and the runs themselves, came to around £205 million. For something that's free, run by volunteers and held in public parks, that's a remarkable return.
What I found most interesting, though, was what drives people's life satisfaction in that model. Health, and particularly how people feel about their health, mattered enormously. The number of parkruns someone had done barely registered. In other words, it isn't racking up runs that makes the difference. It's what taking part does for how you feel.
Why the volunteers seem to get even more out of it
The finding I keep coming back to is about volunteering. A study led by Garcia Ashdown-Franks (opens in a new tab) surveyed 1,661 parkrunners living with a mental health condition and compared those who only ran or walked with those who also volunteered. The volunteers were almost twice as likely to say parkrun made them feel part of a community (56% compared with 29%), and more than twice as likely to say it had helped them meet new people (60% compared with 24%). The authors concluded that it isn't only the physical activity that may help people's recovery, but the volunteering too.
That rings true to me. Handing out finish tokens or cheering people round the last corner puts you in conversation with dozens of people every week, in a way that running past them doesn't. Guha makes the same point with some humour, admitting that he runs so slowly that by the time he finishes, almost everyone except the timekeepers has gone home.
The people who don't come back
Not everyone sticks with it. Guha notes estimates that around 22% of people who register only ever attend once, and that many more come only occasionally. Interestingly, a systematic review by Peterson and colleagues (opens in a new tab) found that people without a running background tended to take part more often than experienced runners, perhaps because they come for the community rather than the clock.
Then there's the question of who turns up at all. A study in Sheffield (opens in a new tab) compared two parkruns, one in a prosperous area and one in a deprived area, and found that the prosperous neighbourhood produced more than five times as many parkrunners. Despite being free and open to everyone, parkrun still draws more heavily from whiter and better-off communities. The authors' conclusion is one I think about a lot: putting an event in a deprived area is necessary, but it isn't enough on its own.
Should doctors prescribe a run in the park?
The editorial also covers the debate about GPs "prescribing" parkrun. The Royal College of General Practitioners has linked practices with local parkruns, and some doctors argue it's a simple, cheap way to tackle inactivity and loneliness. Others, including GP Margaret McCartney writing in the BMJ (opens in a new tab), worry that turning a walk in the park into a prescription makes it feel more like compliance than fun. A response in the same journal (opens in a new tab) argued the opposite, that framing community activity this way could actually help people who would never otherwise come along. I can see both sides, and I suspect the answer depends on the person.
What it means for the rest of us
Guha's summary is that getting outdoors, moving moderately and taking part in non-competitive community activities, away from commercial pressure, is very good for our mental health, and that parkrun brings all of those together. I'd add that the research points to something every running group should take seriously. The benefits seem to come as much from belonging as from the miles, and the people who would gain the most are often the least likely to walk through the door on their own.
So if you've been meaning to try parkrun, go. If you've done a few, try volunteering one week and see how different it feels. And if you know someone who'd never think of going alone, offer to go with them. That might be the most valuable thing any of us does on a Saturday morning.
