Sub-3 Marathon: The 2 Numbers That Prove You're Ready

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

Stop Adding Hard Sessions — Repeat This Instead

You don't need to repeat harder sessions. You need to repeat the boring ones. If you're a serious marathoner who keeps adding the next big workout and still plateauing — this is why. Here's the simple week that built every result I've ever coached, repeated for months. 📞 Ready to have a real marathon breakthrough? Book a free 15-minute Performance Call to see if there’s a coaching fit: https://coaching.allin.run/repeat The runners who improve aren't the ones with the most impressive sessions. They're the ones who repeated a simple week — consistent aerobic volume, one threshold day, one long run — for six to twelve months. This video breaks down that week, why “more hard work” caps you, and how I went from 3:25 and a failed sub-3 to 2:21 by doing less, repeated. Chapters: 0:00 The Repeat Problem 0:51 The Simple Marathon Week That Actually Works 2:45 Why Adding Hard Sessions Caps Your Progress 8:09 How I Went From 3:25 to 2:21 10:19 How to Repeat It Without Burning Out 12:40 What Federer Teaches Runners About Training 13:03 Find the Simple Week and Repeat It ━━━━━━━━━━━━━━━━━━━━ 📺 Watch next: - Fastest Way to Train for a Sub-3 Hour Marathon: https://youtu.be/PUePgZBjRV4 - Sub-3 Marathon: The 2 Numbers That Prove You're Ready: https://youtu.be/kLKf2ZhuJWY - Why 90% of Runners Get Sub-3 Marathon Training Wrong: https://www.youtube.com/watch?v=jNrXRE3upF0 #marathontraining #marathonroutine #howtotrainforamarathon #aerobicbaserunning #consistenttraining #marathonbasetraining #sub3marathon #thresholdtraining #marathonplateau #runtoeffort Music track: Back in Time by Aylex  Source: https://freetouse.com/music  Royalty Free Background Music

How to Train for a Sub-90 Minute Half Marathon

A sub-90 half marathon isn't won on your hard days or your easy days — it's won in the middle, at threshold, the work most runners skip. If you're running 1:32–1:50 for the half now and want to break 90 (and one day break 3 hours), you're probably training in two speeds. Here are the two sessions that fix it, why sub-90 shows up as a byproduct of sub-3 marathon training, and the 5K Check that tells you where you stand today. Most runners chasing a sub-90 half marathon train at two speeds: flat out on hard days, long and slow on easy days — and skip the threshold work in the middle that actually decides the race. That gap is exactly why they fade in the final 5K. Sub-90 (4:16/km · 6:52/mile) isn't a speed problem or an endurance problem. It's a threshold problem. 2:21 marathoner and UK 100km Champion Lee Grantham — the coach behind All In — breaks down the two sessions that build the middle (sub-threshold intervals and a progressive, race-specific long run), why the same engine that wins a sub-90 half is the one that carries you to a sub-3 marathon, and the 5K Check that tells you whether sub-90 is one block away or an engine away. Stop training in two speeds. Build the middle. 📞 Ready for Sub-3, then book a coaching-match call to see if we're a fit: https://coaching.allin.run/sub90-accident Chapters: 0:00  The sub-90 half marathon mistake 0:31  Where sub-90 (and sub-3) is really won 1:15  How sub-90 is a byproduct of marathon training 1:32  The two-speed trap: flat out or crawling 2:13  Sub-90 is a threshold problem 2:46  Session 1 — sub-threshold intervals 3:45  Session 2 — the progressive long run 4:35  Durability: holding form in the final 5K 5:35  The 5K Check — are you ready for sub-90? 6:26  Why your target should be "unreasonable" 7:26  The race card — how I pace your race ━━━━━━━━━━━━━━━━━━━━ 👍 Like, comment and subscribe for more sub-3 and half-marathon training. ━━━━━━━━━━━━━━━━━━━━ 📺 Watch next: - Fastest Way to Train for a Sub-3 Hour Marathon: https://youtu.be/PUePgZBjRV4 - Sub-3 Marathon: The 2 Numbers That Prove You're Ready: https://youtu.be/kLKf2ZhuJWY - Why 90% of Runners Get Sub-3 Marathon Training Wrong: https://www.youtube.com/watch?v=jNrXRE3upF0 #Sub90HalfMarathon #HalfMarathonTraining #ThresholdTraining #Sub3Marathon #RunningTips #MarathonTraining #HalfMarathonPacing #RunSmart Music track: Back in Time by Aylex  Source: https://freetouse.com/music  Royalty Free Background Music

Sub-3 Marathon: The 2 Numbers That Prove You're Ready

Are you ready to run a sub-3 marathon? Before you commit to a sub-3 training block, there are two numbers that tell you you're ready — not nearly ready, ready. The first: a solo 10K time trial in 40 minutes. The second: holding 4:00/km (6:26 per mile) for a full hour — a 15K in 60 minutes, or a 10-mile race in about 64. I break down the exact sessions to build both, why I coach to effort instead of pace, and how one runner went from 3:21 to a 2:56 first sub-3 in Chicago. These are indicators, not goals — hit them on an upward curve and you're one or two training blocks from your Boston qualifier. 📞 Ready to chase your sub-3? Book a free 15-minute Performance Call to see if there's a coaching match: https://coaching.allin.run/sub3_2numbers Chapters: 0:00 The 2 numbers that prove you're ready 0:25 Are you in range? Your 10K start point 0:42 Why speed is a byproduct, not the goal 1:22 Number 1 — a 40-minute solo 10K 1:48 The sessions that build the pace 3:26 Fastest 10K… inside a marathon 4:19 Number 2 — hold 4:00/km for an hour 5:11 The 70-minute long run that bridges the gap 6:42 Why I coach to effort, not pace (Texas → Chicago) 8:15 Recap: the two numbers 8:53 Indicators, not goals — what to do next ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 🚨 If this video helped you, share it with a runner chasing sub-3 :) 👍 Like, comment and subscribe for more sub-3 marathon training. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 📺 Watch next: - Why 90% of Runners Get Sub-3 Marathon Training Wrong: https://www.youtube.com/watch?v=jNrXRE3upF0 - The 4-Month Transformation: 3:35 to 2:53 Marathon: https://www.youtube.com/watch?v=ym-flI6uqxE - How I Went from a 25-Minute 5K to 16:40: https://www.youtube.com/watch?v=Bl79Y37ua5Y #Sub3Marathon #MarathonTraining #Sub3HourMarathon #RunningTips #MarathonCoach #RunSmart #Sub330Marathon #MarathonTips #MarathonRunner #MarathonCoaching #RunMarathon #BostonQualifier Music track: Back in Time by Aylex Source: https://freetouse.com/music Royalty Free Background Music