
You’re three weeks into marathon training. Your plan says “VO2 max intervals today.”
But your easy runs? They still feel too hard.
Your long run? You hit the wall at 90 minutes and had to walk home.
Your threshold? You don’t even know what that should feel like yet.
And now you’re supposed to do speed work?
Here’s the issue: marathon training has an order. Three run types build the foundation. Everything else builds on top.
Most runners do it backwards and get injured, sick or burned out before they even start their marathon. Let’s fix that.
Listen to audio podcast below on your next run or watch the video above to learn more
What You’ll Learn
- The 3 core run types that build 80% of fitness (plus the final 20%)
- Why doing speed work before building your base breaks you
- The proven order elite coaches use
- 16-week plan: foundation first, speed work second, and more
The Problem
Marathon training is complex. You need different types of long runs. Tempo and threshold work. Lots of easy zone 2 stuff. VO2 max intervals and speed work. Hills. Strides. Plyos and strength work. Race pace efforts. The list keeps going.
All of that matters.
But there’s a clear order.
Three run types form the foundation. Not 80% of your RUNS—80% of your FITNESS. These three run types build the engine.
- Long runs build your endurance engine.
- Threshold runs build your speed.
- Easy runs build your durability and recovery.

Everything else? The interval speed work, hills, strides, plyos, strength, sharpening—those are refinements. They deliver the other 20%.
They matter. But they only work if the foundation is solid first.
Most runners get this backwards.
They add speed work in week 2 before their aerobic base even exists. They do race pace efforts when they don’t know their marathon pace yet. They throw in hill repeats before their legs can handle that kind of load.
Here’s why that breaks you: Speed work tears your muscles down harder than easy running.
It creates more damage and more stress. Your aerobic base is what helps you recover so you can rebuild your body after breaking it down.
No base equals no recovery equals injury. The result?
Injured before the race. Just like I did in two of my marathons where I did way too much too soon and brought it into the race.
Or you go into it exhausted and overtrained on race day. Or you hit the wall at kilometer 32/mile 20 because the foundation was never built.
Think of it like building a house. The foundation equals long runs, threshold runs, easy runs. Everything else? Plumbing, electrical, finishing touches.
You can’t install the chandelier before you’ve poured the concrete.
“Most runners aren’t undertrained. They’re training hard in the wrong order.”
The Solution? 16 Weeks Plan: How To Do Each of the 3 Foundation Run Types
I’m going to focus this on someone that’s brand new to the marathon or coming back after a break and needs to rebuild.
Here’s how the 16 weeks break down.
Weeks 1 through 6—Build the foundation.
You’re nailing your easy pace. Building your long run capacity. Learning what threshold actually feels like. You’re building the aerobic base that everything else sits on.
Weeks 7 through 12—Add refinements.
Now you add interval VO2 max and speed work. Now it’s useful.
You add hills because your base can handle it. You practice race pace because you actually know what you’re aiming for.
Weeks 13 through 16—Sharpen and taper.
You dial in race-specific work. Drop volume but keep intensity. You arrive fresh, not broken.
This is smart periodization. Not random workouts thrown together because they sound hard.
So what do these three foundation run types actually look like? Let’s break them down.
Run Type #1: The Easy Run
This is foundation Block #1 because you can’t run marathon distance unless you’ve done the thing short and easy first.
Most people want to skip this. They think easy runs are a waste of time. They’re not.
What it is:
Short, conversational runs. 30 to 60 minutes. These fill the gaps between your long run and your threshold work.
Why it matters:
Easy runs build your aerobic base. That’s your cardio engine. They let you recover while still adding volume. They teach your body to burn fat. They keep your movement patterns sharp without adding stress. And they prevent injuries long-term.
This is the most underrated run in marathon training.
How to master it:
Run embarrassingly slow., nose breathing the entire time.
You should be able to chat in full sentences. Keep your heart rate at 60 to 70% of max. It should feel easy from start to finish.
The goal? Stack up easy volume without stacking up fatigue.
Common mistakes:
Turning every easy run into a tempo run because “it feels too slow to matter.”
Pride getting in the way. You’re worried about your pace on Strava. Someone’s gonna judge you for running 12 minute miles.
Not going slow enough to actually recover.
But if your “easy” runs leave you tired, you’re not ready for what comes next.
“Speed work doesn’t make you marathon-ready if your aerobic base is missing.”
Run Type #2: The Long Run
This is the bread and butter. The engine builder. The thing that separates marathon training from everything else.
What it is:
Your weekly endurance builder. It starts at 90 minutes and builds to 2.5, sometimes 3 hours depending on your pace and experience. Mostly easy pace.
Why it matters:
The marathon is 2 to 5 hours of continuous running depending on how fast you are. Your aerobic system needs to be huge.
This run literally grows your mitochondria. Those are the power plants in your muscles. It teaches your body to burn fat so you don’t bonk at mile 20. It strengthens connective tissue, bones, tendons. And it trains mental toughness for those later miles when your brain is screaming at you to stop.
How to master it:
Start ridiculously easy. Conversational pace. You should feel like you could go all day. No marathon pace segments yet. This is pure aerobic development.
Your focus? Completing the time or distance without blowing up.
Build week over week. 90 minutes. Then 120 minutes. Then 150. Then 180. Gradual progression.
Common mistakes:
- Running it too fast. This ruins the aerobic adaptation. You’re supposed to be building your engine, not racing.
- Adding pace work before you can even complete the distance comfortably. You’re trying to run the last 5K at marathon pace when you can barely finish 2 hours easy. Not yet.
- Comparing your long run pace to someone else’s. Who cares what they’re running? This is your training. Your pace. Your body.
Once you master this—meaning you can consistently hit 1.5 to 2 hours at easy pace and recover well—then you start adding marathon pace segments.
A few variations of long runs include:
- Fast finish
- Big block
- Progression runs
- And medium long runs mid week
You’ve got your easy runs building durability and your long runs building endurance. But how do you actually get faster? Enter run type 3…
Run Type #3: The Threshold Run
This is where you actually get to run faster and practice marathon or slightly faster than marathon pace.
This is the session that makes marathon pace feel easier.
What it is:
A sustained “comfortably hard” effort. Usually 20 to 40 minutes total volume. Could be continuous like a tempo run. Or it could be long intervals with short rest. More on that shortly.
Why it matters:
For most 3-4 hour marathon finishers, their race pace lives between zone 2 and zone 3 running.
For 4-5 hour finishers, your race pace is usually high zone 2.
For fast sub-3 marathoners and those getting close to 2:30, you can push more into high zone 3 for the second half of the race.
Threshold is the pace where your body produces lactate or lactic acid faster than it can clear it.
Train here and you push that threshold pace faster. You make marathon pace feel easier. You build muscular endurance.
Yes—even 5 hour marathoners benefit from training at threshold.
It’s nice to take the governor off for these runs and let your body naturally run fast after holding back with low heart rate easy runs.
How to master it:
Effort level? Starting at a 6 out of 10 and ending at a 7 out of 10. Run at a pace where you can speak in short phrases but not full sentences.
Not 5K pace. Not VO2 max. Comfortably hard — Roughly 10K current fitness and half marathon current fitness.
Workout examples:
20 minutes continuous tempo. Or 3 times 2 miles (3km) at threshold with 1-1.5 minutes easy jog recovery between. Or 5 times 1 mile at threshold with 60-90 seconds rest. Or for advanced runners, 40 minutes steady tempo run at threshold.
Common mistakes:
- Going too hard. This turns into VO2 max work which is the wrong adaptation. You’re not trying to redline. You’re trying to teach your body to clear waste efficiently.
- Skipping it because “it’s not long enough to matter.” Wrong. This session builds your speed endurance. That’s the ability to hold a strong pace without blowing up. That’s the entire marathon game.
- Inconsistent pacing. Surging and fading.
Do this on a flat course if possible or have the power metric on your smart watch to know if you’re surging on hills.
The whole point is steady effort.
And finally – Once you master this—meaning you can hit the prescribed paces consistently and recover within 24 to 48 hours—then you start adding VO2 max intervals. Faster, shorter reps. Hill repeats. Speed endurance work.
But if you can’t nail a threshold run, speed work won’t help you.
Links & Learnings
- 📈 Get Your Free Marathon Training Plan Here: https://dlakecreates.com/marathonfree
- 🎧 Listen, Read and Learn More Here https://dlakecreates.com/marathon3runs
- Run Farther… Without That ‘Why Am I Dying?’ Feeling: https://dlakecreates.com/base2
- The Only 4 Workouts You Need To Run Faster For Longer: https://dlakecreates.com/4×4
- Why Low Heart Rate Running Is Not Working for You (Yet): https://dlakecreates.com/lowhr
- Breath Nose vs. Mouth? Most Runners Pick The WRONG One: https://dlakecreates.com//nosevmouth
- Use VDOT Calculator to get training paces and race estimates https://dlakecreates.com/vdot
- Use this to learn how to run better long runs https://dlakecreates.com/longrun
- Use this to improve your lactate threshold – https://dlakecreates.com/lactate1wtf
- Instagram – https://instagram.com/dlakecreates
- Strava – https://www.strava.com/athletes/120507


