You Don’t Have A Discipline Problem. You’ve Just Been Doing This Alone.
I want to start with a sentence that, for a lot of adults reading this, has been quietly true for years.
You have joined a gym. You went three times a week for the first month. You went twice a week for the second month. By the third month, you were going once. By the fourth month, you weren’t going at all, but the direct debit was still leaving your account, and every time you thought about cancelling it you felt vaguely guilty, so you didn’t, and that £100 a month carried on disappearing for another nine months before you finally got round to it.
If you’ve lived that, you are not alone, and you are not the problem.
The gym is the problem. Or — to be more precise — the shape of solo exercise is the problem. And there is now a substantial body of research telling us exactly why.
What the research actually shows about why adults stick with exercise
Most studies of adult exercise focus on the wrong question. They ask what is the optimal training programme, when they should be asking what makes adults still be doing it in six months’ time. Because the best training programme in the world is worthless if you’ve quit.
A meta-analysis published in February 2024 — which pulled together findings from dozens of separate exercise interventions in middle-aged and older adults — landed on a conclusion that should be on the wall of every gym in the country. The single biggest predictor of whether adults sustain an exercise habit isn’t the type of exercise. It isn’t the intensity. It isn’t even the goal they set themselves. It’s whether the exercise is group-based. (The full study is here if you want to read it.)
Not group-based in the sense of I go to a gym where other people are also exercising in the same room. That’s not group exercise; that’s solo exercise with witnesses. Group-based in the sense of the same people show up at the same time each week, they know your name, they notice when you’re not there, and the activity itself requires you to engage with them.
This is, when you stop to think about it, fairly obvious. We have known for thousands of years that humans are social animals. We have known for hundreds of years that almost everything humans do well, we do in groups. And yet somehow the entire fitness industry — gyms, online programmes, fitness apps, home equipment — is built around the assumption that adults will sustain something difficult on their own, motivated purely by their own willpower.
It turns out we won’t. Or rather, a small percentage of us will, and the rest of us — the overwhelming majority — won’t, and the industry’s response has been to tell us we lack discipline.
We don’t lack discipline. We lack people.
Why the gym keeps not working — even when you really mean it this time
Let me tell you what tends to happen when an adult joins a gym, because the pattern is so universal it’s almost funny.
Week one: enthusiastic. You’ve bought new trainers. You’ve downloaded an app. You’ve got a programme.
Week two: still enthusiastic. The first muscle aches feel like progress.
Week three: the first missed session. You tell yourself you’ll do two next week to make up for it.
Week four: you don’t do two next week. You don’t do one. You feel guilty.
Week five: you go back, but slightly resentfully. The gym is full of people who all seem to know what they’re doing and you have started, in some hard-to-articulate way, to feel like an imposter.
Week six: you start to dread the thought of going.
Week eight: you stop.
The reason this happens — the actual mechanical reason, not the moral one — is that solo exercise requires a fresh act of willpower for every single session. There is nothing pulling you towards the gym other than your own resolve. Nobody is expecting you. Nobody will notice if you don’t go. The exercise itself is fundamentally the same whether you do it on Tuesday or Wednesday or not at all this week. So when you’re tired, or it’s raining, or you had a hard day at work, the maths is brutal: cost of going, high. Cost of not going, zero. You don’t go.
By contrast, when you walk into a session where five or six people know your name and one of them will text you tomorrow asking where you were — the maths is different. Cost of going, still high. Cost of not going, also non-zero now, because you’ll have to explain yourself. Suddenly the willpower question gets help from outside.
That help, multiplied across weeks and months and years, is the difference between people who exercise consistently and people who don’t.
The bigger thing the research is pointing at
The 2024 meta-analysis is one piece of a much larger picture, and the larger picture is more interesting than the headline.
When researchers look at why group exercise works better than solo exercise for adult adherence, they don’t just find “accountability.” They find that group-based physical activity does something specific to two psychological states — self-esteem and social connectedness — and that those two states are the actual mechanism by which exercise improves wellbeing in middle-aged adults. (Recent research here.)
Translated: it isn’t just that the people get you to show up. It’s that the people are part of what makes the exercise work.
Adults who exercise in groups don’t just stick at it longer. They report higher confidence, lower loneliness, better mental health, and stronger life satisfaction than adults doing equivalent amounts of solo exercise. That last finding is genuinely striking. Same exercise, same hours, same physical effort — and the group exercisers come out psychologically better off.
If you have ever stood at the back of a spin class wondering why everyone else seems to be having a transformative experience while you mostly feel sweaty and bored, this is the explanation. You weren’t doing it wrong. You were doing it alone in a room full of strangers, which is structurally not the same activity as doing it with a group of people you know.
Why this matters even more for people who hate the gym
Here is the thing I want every adult reader of this piece to take seriously, because it is the part of the conversation that nobody in the fitness industry wants to admit.
Most adults who don’t exercise regularly don’t have a fitness problem. They have a boredom problem.
The gym is, for most people, profoundly boring. The treadmill is boring. The cross-trainer is boring. The weights room is boring if you don’t already know what you’re doing, and intimidating if you don’t already look like you belong there. Even classes — spin, body pump, the rest — are repetitive, predictable, and require almost no engagement of your mind. You can do an hour of cardio without ever having a single interesting thought.
For some personality types, this is fine. The gym people who really love the gym have, by and large, made peace with the boredom — or even like it. They go in, do the thing, leave. They are not who I am writing this for.
I am writing for the much larger group of adults whose brains rebel against boredom. Who can’t make themselves do something just because it’s good for them. Who need an activity to engage their attention, their judgement, their problem-solving, their interest — or they’ll quietly stop doing it. These people aren’t broken. They have a perfectly reasonable preference for activities that aren’t tedious, and they’ve been told for years that this preference is a moral failing.
It isn’t. It’s just preference. And the answer, if this is you, is not to try harder to like the gym. The answer is to find a form of physical activity that doesn’t require you to override your own personality every time you do it.
What people actually mean when they say they came to judo from the gym
We get a lot of adults at our clubs in Knaphill, Woking, who have come to us specifically because they couldn’t make the gym work. Different ages, different jobs, different reasons — but a few things keep coming up when I ask them why they stayed when they hadn’t stayed at other things.
The first is that the time goes. Adults at the gym are often looking at the clock from minute three. Adults on a judo mat — even at their first session — find that an hour has gone by and they didn’t notice. Something about having to think, having to react, having to engage with another person, makes the time disappear in a way that solo cardio doesn’t.
The second is that the exercise is the by-product. People come for the activity, and the fitness happens around the edges. Nobody at a judo session is counting calories burned or watching their heart rate. They’re trying to throw the person opposite them, or trying not to be thrown, or working out why their grip keeps slipping. The cardiovascular workout, the strength training, the flexibility, the balance — all of it happens because the activity demands it, not because the adult is grimly performing it.
The third is the people. A judo club is one of the few places in modern adult life where you regularly engage, physically, with other adults you don’t already know. You learn their names because you have to. You notice when they’re not there. They notice when you’re not there. Over months, this builds into something that is much more than a fitness class — it’s a small community, and a kind of community most adults in their forties and fifties don’t realise they were missing until they find it.
The fourth — and I’ll be honest about this one — is that judo is hard. You don’t get good at it quickly. There is no shortcut. You have to keep showing up for years to become genuinely capable. And for the kind of adult who finds the gym boring, the difficulty is actually the thing that keeps them coming back. There is always another technique. There is always another grade. There is always someone better than you in the room, and that’s not depressing — that’s interesting.
What I would do if I were you
I’m aware that an article that ends with “and the answer is to come and do judo” is going to sound, to a careful reader, like the answer the writer was always going to arrive at. So let me make a slightly bigger point.
If you have been struggling to sustain exercise as an adult, and you’ve assumed the problem is your discipline, please stop assuming that. The research is now clear: the problem is almost certainly the shape of what you’ve been trying to do, not the amount of effort you’ve been putting into it.
The two things that matter, based on the evidence, are:
The activity has to be group-based in a meaningful sense — the same people, regularly, who know who you are.
And the activity has to be interesting enough that you don’t have to white-knuckle your way through it. Something that engages your brain, not just your body.
That could be a running club where you do the same Tuesday-night route with the same six people. It could be a climbing wall where you’ve got a regular partner. It could be five-a-side football on a Thursday with the same team. It could be a tennis club. It could be — and this is where I have to declare my interest — adult judo at one of our two clubs in Knaphill or Merrow Village.
The activity matters less than the shape. Pick whatever you’ll go to. Pick whatever you’ll keep going to when it’s cold and you’re tired and you’d rather not. The data is very clear that the right shape, repeated for years, beats the wrong shape attempted with willpower alone every single time.
You don’t have a discipline problem.
You’ve just been doing this alone.
We run adult judo at our clubs in Knaphill, Woking in Surrey. We have men and women, beginners and experienced players, people in their twenties and people in their sixties. Most of them came to us after trying something else that didn’t stick.
We offer a 14-day VIP pass for £1 so you can try it properly — three or four sessions — before deciding whether it’s for you. No commitment, no pressure, no expectation. Just come and see whether this is the shape you’ve been looking for.
Fill in a form and our team will help you take the next step.
And if judo isn’t your thing — genuinely, find your version. Whatever it is. The evidence is on your side.
— Vince Fighting Fitness Judo, Knaphill & Merrow Village
