The Difference Between Knowing and Doing

The most irritating thing about my weight isn’t that I don’t know what to do. In many ways, that would be easier. If ignorance were the problem, then the answer would be simple. Learn the information, apply the information, change the outcome. Nice, tidy, deeply comforting and almost completely unrelated to how my life has actually worked.

The reality is that I know a lot about fitness, nutrition and weight loss. I believe calories in and calories out is the foundation of weight gain and weight loss. Some people have conditions, circumstances and struggles that make managing that balance much harder, but the underlying principle doesn’t disappear because life is unfair. I also believe most meaningful progress is built through sets and reps. Weight training is sets and reps. Learning is sets and reps. Building a business is sets and reps. Relationships, confidence, leadership, writing, discipline and probably even sex are all some version of sets and reps, although preferably with a bit more romance and far fewer spreadsheets.

Whatever you want to become great at, you do repeatedly until you improve. When it gets easy, you increase the weight.

That is the theory. The application is where things become a little less heroic.

I struggle to apply almost all of it consistently. That’s not because the principles are complicated. It’s because changing is hard. Breaking bad habits is hard. Breaking addiction is hard. Building discipline after years of negotiating with yourself is hard. There’s a version of me that sees laziness in almost every poor decision, and whether that’s fair or not, it’s the voice I often hear. I can last a week. Sometimes a little longer. I can get excited, work hard, imagine the end result and feel as though something has finally clicked. Then motivation fades, discipline hasn’t yet taken over, and the whole thing begins to loosen.

If you’ve been there, you’ll know that feeling. It’s not always a dramatic collapse. Sometimes it’s quieter than that. The grip loosens. The excuses get smarter. The old rhythm starts tapping on the door again.

That is the pattern I’ve lived more times than I can count.

Early excitement is easy. It feels good. You buy the notebook, set the goals, picture the result and convince yourself that this time will be different. The danger is that excitement can impersonate change for a while. It gives you energy, but not always structure. It gives you belief, but not necessarily resilience. Then the first test arrives. A busy day. A bad meal. A missed session. A poor night’s sleep. A stressful week. Suddenly the plan feels less like a new identity and more like another thing you’re failing at.

For me, the breakdown often begins when there aren’t immediate results. That’s embarrassing to admit because I know better. I know weight loss takes time. I know strength takes time. I know progress isn’t meant to be instant, dramatic or perfectly linear. I’d tell anyone else that. Yet when I’m the one doing the work, some impatient part of me still wants astounding evidence within days. When it doesn’t arrive, the old negotiations begin.

Tomorrow becomes the most dangerous word in the language.

Start tomorrow sounds harmless. It doesn’t sound like quitting. That’s why it works. It lets you keep the illusion that the plan is still alive while giving yourself permission to avoid the discomfort today. One missed day becomes two. Two becomes three. Then eventually the plan hasn’t ended in one dramatic collapse, but has faded away through a series of small, reasonable, well-explained decisions.

I know my excuses. Perfection is one of them. Preparation is another. I know preparation would help me, yet I often don’t do it. That is self-sabotage, dressed up as busyness. I also know I chase quick dopamine fixes from gaming, films, TikTok or anything else that offers an immediate hit without demanding much effort from me. I’m not saying relaxation is wrong. It isn’t. But I enjoy those things much more when they come after effort. The problem is when they become a substitute for effort, and then later I regret the lost time.

Knowing what to do and still not doing it is devastating in a way that’s difficult to explain without sounding dramatic. It’s embarrassing. It makes you feel like a fraud. It makes you feel as though people have no reason to listen to you because your body looks like evidence of your knowledge. How can the fat bloke know anything about weight loss and exercise? The sad truth is that a lot of overweight people know more about fitness and dieting than a lot of “normal” people, because they’ve researched, started, failed, restarted, tried again and consumed endless information in the hope that the next thing will finally unlock it.

Knowledge and application are not the same thing.

That is one of the central truths of Lactic Fire. Most of us don’t need another obvious answer dressed up as a revelation. We need to understand why we don’t do the things we already know would help. That is much harder because it forces you to look at fear, shame, boredom, preparation, comfort, addiction, self-image and the quiet ways you avoid the possibility of being judged.

I think fear plays a bigger role in failure than many people admit. Fear of judgement. Fear of criticism. Fear that people will laugh. Fear that you’ll try publicly and fail publicly. Fear that even success won’t give you the feeling you thought it would. I’ve started and stopped so many projects, and I can dress that up in all kinds of language, but fear is often somewhere in the room.

The peculiar thing is that I also know I can achieve things. I’ve managed to do well in different areas of life, sometimes with what feels like minimal effort, and people have praised me for it. That creates its own problem because I don’t always trust praise. I need it and hate it. I want recognition but often feel it wasn’t earned because I know what I might have done if I had truly pushed myself. Sometimes knowing too much, or believing you could do much more, becomes a way of never being satisfied with anything.

That is why consistency can’t be some fantasy version of life where every day is perfect, every meal is weighed, every workout is completed with cinematic intensity and every bad habit disappears because I bought a new water bottle. Real consistency has to survive my actual life. It has to allow for stress, tiredness, family, work, pain, boredom and the occasional cheeseburger that arrives with the emotional force of a religious experience.

For me, realistic consistency probably means something like an 80/20 life. Most of the time, I want to be all in. Training, eating better, writing, building, learning, pushing, improving. Then there has to be space to relax, enjoy and, ideally, feel proud. That last bit may be the hardest because I’m not sure I’ve ever truly been proud of myself. I move too quickly to the next thing. I dismiss the thing I just completed. I focus on the gap between what I did and what I believe I could have done.

Maybe part of consistency is learning to respect the effort while still wanting more.

The gap between knowing and doing is where most transformation fails. Not because people are stupid. Not because they’re lazy pigs, despite what society often suggests about overweight people. It fails because knowing is clean and action is messy. Knowing happens in your head. Doing happens when you’re tired, hungry, irritated, stressed and tempted by the same old habits.

That is why I need to stop collecting information as though the missing answer is hiding in the next book, podcast or article. The next stage isn’t knowing more. It’s doing more of what I already know.

Sets and reps.

Again and again.

Until the action finally catches up with the knowledge.

Disclaimer: This article reflects personal perspectives and experiences relating to fitness, mindset and wellbeing. It is intended for informational purposes only and is not a substitute for professional medical advice, diagnosis or treatment.