The Long Game: What 15 Marathons Taught Me About Running with T1D (Part 12 of 12)

The Long Game: What 15 Marathons Taught Me About Running with T1D (Part 12 of 12)

By Ali | AliRunsOnInsulin.com | The Run Starts Before the Run Series

We made it to Part 12.

Eleven posts of protocols and research and gear lists and decision frameworks. And now, at the end of the series, I want to set all of that down for a minute and talk about the thing underneath all of it.

The long game.

Not the 26.2 miles on race day. The years of runs that built you into someone who shows up to the start line. The education that happens in the miles, not in the textbooks. The things you can only learn by doing this — by being a T1D runner over time.

Here’s what 15 marathons taught me.

Lesson 1: Your Body Is the Most Sophisticated Research Tool You Have

I have read every study in this series. I have cited peer-reviewed research on CGM lag time, basal reduction protocols, menstrual cycle insulin resistance, race-day adrenaline, and the long-term cardiovascular benefits of endurance training for T1D.

And none of it — not a single study — told me what my body specifically does at mile 18 of a marathon in October versus mile 18 in April. None of it predicted exactly how my blood sugar responds to a 4am start corral wait in New York City weather. None of it knew my specific patterns.

The research gives you the framework. Your body gives you the specifics.

Research is where you start. Your training log is where you finish. Every study I’ve cited is a starting point for a personal experiment — and you are the only person who can run that experiment on yourself.

–Lesson 2: The Protocol Is Not the Point. The Learning Is.

When I ran my first marathon, I had a goal: under four hours. That is not a modest goal for a first marathon. That is a goal you fight for, mile by mile, making decisions in real time while managing T1D and trying not to let the pacer disappear around a corner.

At some point in those final miles, I found myself running alongside a complete stranger. We’d both locked onto the same pacer, both chasing the same number. We didn’t need to talk about it. We just ran together — two people who had never met, holding each other to a standard neither of us wanted to let go of alone. We passed the pacer. We crossed the line under four hours.

That race taught me something that no training plan contains: sometimes the goal you fight for is worth more than the goal you manage perfectly. And sometimes the person running beside you — someone you’ll never see again — is exactly who you needed.

The protocol matters. Everything in this series matters. But the protocol is not a guarantee. It is a hypothesis. Every run is a test. Every race is data.

What separates experienced T1D runners from beginners isn’t a better protocol. It’s the accumulated understanding of their own body that comes from running the experiment again and again.

Don’t be discouraged by the runs that teach you things the hard way. They are the most expensive lessons and the ones that stick the longest.

Lesson 3: The Physical Benefits of Running With T1D Are Real and Compounding

Here’s the good news side of the long game, and it is genuinely good news.

Regular endurance training is associated with reduced HbA1c, decreased daily insulin requirements, improved cardiovascular fitness, and better overall glycemic control over time in people with T1D. A systematic review and meta-analysis found that exercise training reduced HbA1c by an average of 0.45% and decreased daily insulin dosage meaningfully in T1D individuals. Research has also shown a case of a T1D runner who ran over 90 marathons and ultra-marathons over his lifetime — and as his monthly running volume increased over the years, his HbA1c levels decreased alongside it.

The body adapts. Muscles become more efficient at using glucose. Insulin sensitivity improves. The management that felt impossibly complex in the beginning gets, gradually, more predictable — not because T1D becomes easier, but because you understand it better, and because your body has physically changed in response to the training.

Running doesn’t cure T1D. But it changes your relationship with it. For the better, over time, if you keep at it.

Lesson 4: Community Is Not Optional

T1D is isolating in a specific way. It’s a condition that’s invisible most of the time, that requires constant private management, and that most people in your life — including most runners — don’t fully understand.

Running with T1D, specifically, is an experience that only other T1D runners really get. The pre-race CGM check ritual. The moment at mile 4 when your legs feel good but your number is trending down and you have to make a real-time decision. The strange pride of finishing a race having managed everything well — or the strange grief of not quite finishing and knowing why.

Find your people. They exist. The T1D running community is real, it is active, and it contains people who have run every distance from a 5K to a 100-mile ultra while managing this condition. Being part of that community — reading their stories, sharing your own, asking questions in spaces where people understand the specific question — changes something about how you carry this.

You don’t have to figure it all out alone. The whole point of this series was to put some of what I’ve learned into your hands. That’s what community does.

Lesson 5: Your Finish Line Means Something Different From Everyone Else’s

Every runner who crosses a finish line has done something hard. I don’t minimize that for anyone.

But when a T1D runner crosses a finish line, there is a layer of accomplishment that doesn’t show up in the official results. The blood sugar that held steady for four hours. The low at mile 18 that you caught and treated and ran through. The race morning protocol that worked when it had to. The years of logging that built the knowledge to manage race day.

A study examining how T1D runners cope with marathon preparation found that the process of learning to manage T1D during endurance events creates a specific kind of athlete — one who has developed deep self-knowledge, tolerance for uncertainty, and the capacity to solve real problems in real time under physical and psychological pressure.

Those qualities don’t stay on the course. They travel home with you.

What you’re building by running with T1D is more than fitness. It’s a kind of competence — a knowledge of yourself and a capacity to navigate difficulty — that extends into every corner of your life.

Lesson 6: Perfect Management Is Not the Goal

I have run 15 marathons with Type 1 diabetes. I have had exactly zero of them go exactly according to plan.

There has always been something — a number that didn’t cooperate, a gel that hit late, a sensor that read low when I felt fine, a post-race drop that caught me off guard. Every single race, something.

And I have crossed every single finish line.

The goal was never perfect management. The goal was safe, effective management — keeping myself in a range where I could perform, protecting myself from genuine danger, and making the best decisions available to me with the information I had in that moment.

Some races that goal looked like a nearly flat CGM line for 26 miles. Some races it looked like eating three gels in a row at mile 20 and running the last 6 miles on pure stubbornness.

Both are success. Both belong in the log. Both taught me something.

If you are waiting for the race where everything goes perfectly before you decide you’ve “figured it out” — you’ll wait forever. The people who figure it out are the ones who decide that imperfect execution in real conditions is enough. That showing up and doing the work with what you have on that day is enough.

It is enough.

What This Series Was Really About

Every post in this series was built on research. CGM lag time. Basal reduction timing. Ketone thresholds. Menstrual cycle insulin resistance. Post-run glycogen kinetics. Race day adrenaline physiology. All of it real, all of it sourced, all of it aimed at giving you the most accurate starting point I could.

But the series was really about something else.

It was about the hour before mile one. The systems check that nobody else sees. The decision to go anyway when the numbers aren’t perfect. The courage that lives in the preparation — in the log, in the belt, in the gel pocket, in the 90-minute basal adjustment you set before you even put your shoes on.

That’s where the run starts.

Not at the start line. Not when your watch starts. Long before any of that.

It starts in the living you’ve done with this condition. In the knowledge you’ve built. In the decision, made again and again, to go.

Fifteen marathons. A lifetime of learning. And still — every single time — the run starts before the run.

The Series: All 12 Parts

1. The Complete Pre-Run Protocol for Running with T1D

2. The Perfect Pre-Run Blood Sugar Doesn’t Exist

3. Mile by Mile: Managing Blood Sugar While You’re Actually Running

4. The Post-Run Window: Why Your Blood Sugar Isn’t Done Moving When You Stop

5. Race Day: Why Everything You Know About Training Runs Goes Out the Window

6. The Training Log: Why Writing It Down Is the Most Powerful Tool You Have

7. The Gear: What a T1D Runner Actually Needs to Carry