I posted something on Instagram this week. I’m 41, not slowing down, still pushing, still lifting heavy, still learning new calisthenics skills, still running marathons and setting PBs. A lot of my peers are winding down at this point, easing off, telling themselves that’s just what happens in your forties. I’m not doing that. I take pride in being capable, and I train that way on purpose.

That post got a good response, but it left me with a question I couldn’t quite answer in a caption. What does capable actually mean?

Your twenties are for building the base

In your twenties, training is often about looking a certain way, chasing a specific goal, and there’s nothing wrong with that. It matters. Your body barely thinks about recovery at that age, it just heals, which makes your twenties genuinely the best window you’ll get to build your baseline of muscle. I actually think you should train for maximum muscle growth in your twenties, precisely because it’s the easiest time to pile it on, and if you stay consistent, that base pretty much stays with you for life. If there’s a time to be a little vain about the mirror, to chase size and shape for their own sake, that’s it. You’re not wasting your twenties by caring how you look, you’re building capital you’ll draw on for decades.

Then your thirties and forties arrive, and for most of us, something shifts. Not the caring how you look part, I still care, plenty of people my age still do. But it stops being the whole point. It becomes more about personal missions. Achieving specific goals. Some people enter events. Some just stay consistent for its own sake. But the outlook changes, whether you notice it happening or not.

For me, the shift landed around 25. That’s when it stopped being about how I looked and became about being capable over everything else. I still do events. I still train hard, still chase PBs, still care about aesthetics on some level. But underneath all of that, the real scorecard changed. Can I move well. Can I run, jump, play, carry, lift myself off the ground and back up again. Those became the backbone of everything else I do, the twenties-era muscle base included.

It’s not what it looks like from the outside

The easy answer is the visible one. Capable looks like lifting heavy, running fast, holding a handstand, having the kind of body that clearly does something. And look, that’s not nothing. How you look is a byproduct of what you can do, and I’m not going to pretend that doesn’t matter to me.

But if that’s all capable meant, it would just be vanity with better PR. There’s a deeper version of it that most people underestimate completely, and it’s the one I actually care about.

Capable means being useful when it counts

Here’s how I really think about it. Capable means your body is never the limiting factor when something actually matters.

It means being able to carry someone to safety if you had to. Give chase if someone needed catching. Get to a child in the road before it’s too late. Be the person other people can depend on in an emergency, not because you hope you’d rise to it, but because you already know you can, because you’ve built the capacity for it in advance.

Most people never test this. They go their whole lives without needing to know if their body would show up when it mattered. I don’t want to find out in the moment. I want to already know the answer, and the only way to know is to build it long before you ever need it.

That’s the real reason age doesn’t get to be the excuse for me. Emergencies don’t wait for you to be in your twenties. They don’t check your training log first. If capability is the thing that matters, then slowing down isn’t a neutral choice, it’s a decision to be less useful to the people around you than you could have been.

But there’s a version of this that’s even harder to fake

Here’s the part I’ve been sitting with, and honestly I think it might be the more important half of this whole idea.

Capable isn’t only about what you could physically do for someone else. It’s about who’s looking back at you in the mirror.

I don’t just mean how you look. I mean whether you like the person you see, and whether that person has kept their word to themselves. Every broken promise to yourself chips away at that, quietly, in a way nobody else ever sees. The session you skipped when nobody would have known. The habit you said you’d start and didn’t. The thing you told yourself you’d fix and just kept ignoring for a decade, the way I did with my shoulders until chasing a handstand finally gave me a reason to stop lying to myself about it.

You can’t fake your way past that one. You can post the outcome, the marathon medal, the muscle-up, the PB, but you already know, better than anyone watching, whether you actually did what you said you’d do to get there. Capability built on kept promises to yourself is real. Capability that’s just the leftover appearance of effort, without the discipline behind it, isn’t, and deep down you know the difference even if nobody else could tell.

That’s the version of capable that actually determines the other version. You don’t become the person who could carry someone to safety by accident. You become that person through years of small promises kept when it would have been easier to let them slide.

Why I don’t accept slowing down

So when I say I’m not slowing down at 41, this is what I actually mean. It’s not stubbornness, and it’s not about proving something to my peers who’ve eased off. It’s that I want to stay useful, physically, for as long as I possibly can. And I want to be able to look at myself and know I kept my word, session after session, year after year, not just when it was convenient.

Looking a certain way is capable, on some level. But it’s the shallow end of it. The real test is whether your body would show up in the moment that actually matters, and whether the person in the mirror is someone you trust to have done the work to get there.

That’s what I’m training for. Not the appearance of capability. The real thing, tested and kept, one promise at a time.