Most Runners Underestimate Their Marathon Fuel Needs

You Didn't Get Slower. You've Been Training Wrong.

You didn't get slower with age. You've been training the wrong way — and that's fixable. If you're chasing sub-3 or sub-3:30 and your paces have stalled, you've probably decided it's your age. It almost never is. This breaks down what actually changes after 40, what doesn't, and why most plateaus are a training problem, not a ceiling. Most men over 40 blame their age for missing sub-3. In my experience coaching runners, it's almost never the age. One thing does fade — the very top of your engine, your VO2max. But the things a sub-3 marathon actually runs on — your lactate threshold, your efficiency, your ability to hold pace deep into a race — barely age at all. And even that engine decline is mostly detraining, not biology. There's a reason most runners plateau for years: they're not at the limit of their body, they're at the limit of their method. Fix the training, and the breakthrough that follows is real. This video covers what changes after 40, the numbers sub-3 actually demands, and the shift that decides whether you get there. Book a free 15-minute Performance Strategy Call — I'll tell you how close sub-3 is for you: https://coaching.allin.run/sub3-40 00:00  Why Sub-3 After 40 Isn't Behind You 01:10  What Age Actually Takes: VO2max Explained 01:58  Why Max Heart Rate Falls (and Zones Aren't 220 Minus Age) 02:34  Recovery Time After 40 02:44  The Real Reason Your VO2max Drops — Training, Not Age 03:26  You're in Your Prime: The Winnable Decade 04:04  Lactate Threshold: The Real Sub-3 Predictor 05:07  Running Economy and How Breakthroughs Happen 05:57  What It Actually Takes to Run a Sub-3 Marathon 06:35  Sub-3 Is a Time and Consistency Problem, Not Talent 07:07  The Bigger Picture: Age Is a Perspective Problem 07:44  Self-Handicapping: The Excuse Before the Start Line 09:12  You Can't Go Back — What Do You Want From the Next 60 Years 10:14  Train First Thing: Running Builds Character RELATED The Long Run That Tells You If Sub-3 Is Realistic https://youtu.be/cw4a6JjNovI Sub-3 Marathon: The 2 Numbers That Prove You're Ready https://youtu.be/kLKf2ZhuJWY Same Heart Rate, 2 Min a Mile Faster https://youtu.be/jbXYlXJXHbo #Sub3Marathon #MarathonAfter40 #MarathonTraining Music track: Back in Time by Aylex  Source: https://freetouse.com/music  Royalty Free Background Music

Why the First Rep Always Feels the Hardest

If rep one always feels like your hardest rep, your warm-up failed before the session started. Most runners jog a couple of easy miles, stop, then wonder why they don't arrive until rep three. Book a free 15-minute Performance Strategy Call: https://coaching.allin.run/rep-one Chapters: 0:00 Why Your First Interval Rep Feels the Hardest 0:26 The Real Cost of a Bad Warm-Up 0:48 What Most Runners Get Wrong 1:52 The Injury That Changed My Warm-Up Forever 2:16 The Five Minute Walk (Body Check) 2:44 Light Jog and Listen to the Body 3:48 Dynamic Stretching for the Power Muscles 4:12 The Step Almost Everyone Skips 4:46 Prime With Two Accelerations 5:18 Straight Into Rep One (No Delays) 5:59 Why a Proper Warm-Up Compounds Over Months 7:07 Marathon Coaching Call Related videos: This Summer Will Break You — or Build You https://youtu.be/VZd5XIbfnms Your Interval Session Is Two Workouts in One https://youtu.be/DqsKHQxVb8A Music track: Back in Time by Aylex Source: https://freetouse.com/music Royalty Free Background Music

This Summer Will Break You — or Build You

The Pace Trap: the reason your marathon paces fall apart the moment it gets hot — and it isn't the reason you think. If you're chasing sub-3 or sub-3:30 and your summer paces have slipped, you've probably decided you're losing fitness. You're not. Here's what the heat is actually doing to your watch, why the number is lying, and the one thing to anchor to instead. In this video: - Why heat slows your pace at the same effort — physics, not lost fitness - The problem with heat pace-adjustment charts, and what to anchor to instead - How to compare a summer session to a spring one without fooling yourself - What heat training quietly banks for a cool race day - Heat vs altitude: the most underrated free tool you have - What Western States 2026 showed about chasing the number 00:00  It's July and your pace just fell apart 00:32  Why heat breaks your pace (the physics) 01:29  The pace-chart trap 02:49  The race that taught me this 04:29  The fix: anchor to effort, not pace 07:03  How to compare summer and spring sessions 08:47  Banking heat adaptation 10:01  Proof at 100 miles: Western States 10:21  Trust the process Book a Performance Strategy Call — a free 15-minute call to map where you are and how to get to your goal: https://coaching.allin.run/book-psc All In Performance Coaching helps committed marathoners — mostly working professionals chasing sub-3 and sub-3:30 — train with the precision usually reserved for elites. Coaching to effort; building the full engine and the durability to hold form late. New videos most weeks. #marathontraining #runningtoeffort #heattraining  Music track: Back in Time by Aylex  Source: https://freetouse.com/music  Royalty Free Background Music

Your 5K Says Sub 3 — Your Marathon Says No

An 18:30 5K should mean a comfortable sub-3 marathon. Every race-time calculator is certain of it. So why do so many fast 5K runners keep missing sub-3 — while runners who can't break 19:30 run it every single time? This video shows you what your 5K actually measures, why the marathon rewards something completely different, and the one change to your Saturday that builds more marathon fitness than chasing a parkrun PB ever will. If you are a time-poor runner with a job, a family and a marathon goal, this is how to use the few hours you have — and why your slow 5K is almost certainly underselling you. Book a Performance Strategy Call and find out what is actually capping your marathon: https://coaching.allin.run/1830trap — CHAPTERS — 0:00 The 5K Calculator Lies About Your Sub-3 Marathon 0:30 The Maths That Looks Airtight 0:57 The Hidden Number From 50 Years Ago 2:06 Why It Works for Elites (Not You) 3:16 What 18 Minute 5K Means for Real Runners 4:16 It's Not Fitness — It's a Structure Problem 4:48 Two Runners, Same Time, Opposite Engines 6:31 How Slow Can Your 5K Be and Still Run Sub-3? 9:09 Why Building a Fast 5K Hurts Your Marathon 9:46 Stop Racing Parkrun (Use It This Way Instead) 11:50 The Double Parkrun Session 13:58 You Don't Need a Faster 5K to Run Sub-3 In this video: - Why 5K-to-marathon calculators over-predict for recreational runners - What the 5K measures (VO2max, speed) vs what the marathon rewards (threshold, durability, fuelling) - Why lactate threshold predicts marathon performance better than VO2max - How slow your all-out 5K can be and still sit on a sub-3 marathon - Why time-poor runners can't build 5K speed and marathon endurance at once - How to turn your Saturday parkrun into a 2x5K threshold session - The progression and the mid-block half-marathon that becomes your real scoreboard Related: - Your Interval Session Is Two Workouts in One: https://youtu.be/DqsKHQxVb8A - Most Runners Get Zone 2 Wrong Without Realizing: https://youtu.be/oUnyfAN21fk All In Performance Coaching — marathon coaching for the committed sub-3 to sub-3:30 runner. Run to effort. Build the engine. Hold form to the line. #Sub3Marathon #MarathonTraining #parkrun

Your Interval Session Is Two Workouts in One

Your VO2max session and your threshold session can be the exact same workout — 8×1K off short rest. What decides which one you actually get is how you run it. Most committed marathoners are training one when they think they're training the other — and it shows up in the back half on race day. Here's the dial, how to build it, and the one question that matters more than reps or pace: what's actually holding YOU back. Leandro asked a great question: he's about 12 weeks from his marathon, running 8×1km off 60 seconds, and wants to know whether to add reps (10×1km) or make them longer (5×2km). The honest answer is that neither is the decision that matters — because the same session can be an easy run, a threshold session, or a VO2max session depending on nothing more than how hard you run the reps. In this one I break down how to turn 8×1km into the session your marathon actually needs: how to progress it without running too fast (the #1 mistake I see in 2:30–3:30 marathoners), why your lactate threshold — your one-hour race pace — is the single best predictor of marathon success, how much VO2max a sub-3 marathon really takes (less than you'd think), and how to pace the race itself. The thread running through all of it: until you know your own limiter, every plan is guesswork. ⏱️ CHAPTERS 0:00 8×1km Intervals: More Reps or Longer? 0:54 Same Session, Two Workouts (VO2max or Threshold) 1:32 How to Progress the Session Without Running Too Fast 2:50 The #1 Predictor of Marathon Success: Lactate Threshold 3:16 Turn 8×1km Into a Threshold Session 3:53 What's the Purpose of This Session? 4:23 How Much VO2max You Really Need for Sub-3 4:58 Push Your Threshold Right (LT1 & LT2) 5:44 How to Pace a Sub-3 Marathon 6:33 It Depends on Your Limiter 7:26 Train Smart, Not Just Hard 🎯 WORK WITH ME Chasing a sub-3 or sub-3:30 marathon this autumn — New York, Chicago, Berlin or anywhere else — and want the best possible result from the training time you've got? Book a Performance Strategy Call: https://coaching.allin.run/8x1k 📺 WATCH NEXT Long Run Pacing Explained: Get It Right, Run Faster: https://youtu.be/KIpuHebfjY0 How to train for a sub-3 marathon: https://youtu.be/PUePgZBjRV4 #Marathon #MarathonTraining #Sub3Marathon Music track: Back in Time by Aylex  Source: https://freetouse.com/music  Royalty Free Background Music