There's a doubt that quietly stops a lot of people before they've even laced up, and it might be the reason you're reading this: aren't I a bit too old to be taking this up now?
Let me put you out of your misery. No. And I don't say that to be kind. I say it as someone who didn't take running seriously until his late thirties, and went on to run a sub-3 marathon off the back of it. The journey is real. I've made it myself.
So let's deal with the worry honestly, then talk about how to start, without ending up injured in week three and swearing the whole thing off.
Your body hasn't read the memo
The bit nobody mentions: the part of you that gets fitter when you train doesn't check your birth certificate first. Run a little more than you're used to, recover, come back stronger, and that mechanism doesn't quietly switch itself off at 40, or 50, or 60. The improvements a brand-new runner sees in their first year are some of the biggest they'll ever get, and you're entitled to every single one of them.
What does change, and why it's mostly in your favour
A few things are different at 40-plus. Most of them, it turns out, are on your side.
You're more consistent. And consistency, not heroics, is what makes runners. The patience that comes with a bit of life experience is exactly what the sport rewards. You're far less likely to do something daft in week two and pay for it in week three.
You recover a little slower. This is the one genuine caveat, and it's easily managed. Nothing dramatic. It just means easy days need to be properly easy, and a touch more recovery between the hard ones. Less a limitation, more a nudge to train the way you probably should have been training all along.
You're doing it because you want to. Nobody's making you. That tends to make for a runner who's still at it in five years' time.
The thing that ends most attempts
It isn't age. It's enthusiasm. The single biggest predictor of a running injury isn't your weekly mileage. It's a sudden jump, a run much longer or harder than your body has seen recently (Garmin-RUNSAFE, BJSM 2025). New runners don't get hurt because they're 44. They get hurt because they got keen, did too much too soon, and their legs sent the invoice a fortnight later.
So for your first few months, the whole game comes down to two things: build the habit, and stay healthy. Get that right and the fitness turns up on its own.
How to start
- Run-walk, and don't apologise for it. A few minutes running, a minute walking, repeat. It's not cheating, it's how you build the engine without overloading the legs.
- Keep it "easy", and I mean properly easy. If you can't hold a conversation, you're going too fast. Almost all of your running should feel comfortable, bordering on boring, even a touch embarrassingly slow at first. And that's not me going soft on you: recreational runners who keep the bulk of their training easy improve more than those who flog themselves (Muñoz et al., 2014). (If "easy pace" still sounds vague, it's the thing most people get wrong, and I've gone into it here.)
- Three days a week is plenty. With a rest day in between. You're building a base, not chasing a number on Strava.
- Build slowly. Add a little each week, take an easier week roughly every fourth, and resist the very strong urge to make up for a missed run by doubling the next one.
That's it. No magic, no minimum age buried in the small print, no need to be fast. Running doesn't reward starting young, it rewards turning up.
So start small, keep it easy, and give it a few months. Plenty of people get going later than they'd ever have expected and end up surprising themselves. No reason you can't be one of them.