Supplemental Marathon Training: The Extras That Make Marathon Pace Feel Easier

By RunDoyen.
Featuring coaching insights from David Jankowski and Tara Welling.
Adapted from a RunDoyen coach conversation and edited for clarity.

TL;DR (keep this simple)

• Don’t drop speed just because you’re training for 26.2, short reps keep your stride sharp.
• Strides are controlled accelerations for form and turnover, not mini workouts.
• Core means hips + trunk + back, marathon posture is a strength problem as much as a fitness problem.
• Recovery tools help when used well, more pressure and more time is not always better.
• Sleep is training, protect it like you protect the long run.
• The best extras support your key runs, they don’t compete with them.

If you want help deciding which “extras” actually fit your training, you can get matched with a running coach who can plug them in without sabotaging your workouts.

Table of Contents

1. Why “supplemental” work matters (and when it backfires)
2. Speed work in a marathon build: what to keep, what to avoid
3. Strides: the simplest way to stay snappy without digging a hole
4. Core and stability: marathon posture is earned
5. Recovery tools: foam rolling, mobility, stretching, and when less is more
6. Sleep: the recovery lever most runners underuse
7. Strength and drills: build a body that can hold marathon form
8. Common mistakes with marathon add-ons
9. Safety and when to get help
10. Putting it together: a realistic weekly add-on plan

1) Why “supplemental” work matters (and when it backfires)

Most marathoners know the obvious pieces: build mileage gradually, do long runs, practice marathon pace, fuel well. Where many runners stall is assuming the next breakthrough only comes from adding more miles.

At some point, “more” stops working. You hit a ceiling where:

• Your body can’t absorb more volume without getting cranky.
• Your workouts get flatter because you’re always tired.
• You feel durable in training, but race-day pace still feels harder than it should.

That’s where supplemental marathon training comes in: small, targeted add-ons that improve efficiency, durability, and execution. The goal is not to create a bigger checklist. The goal is to build a more complete runner.

A useful mental rule: the right add-on supports your long run and quality sessions. The wrong add-on competes with them.

If you want a bigger-picture structure for marathon training, start with the Marathon Training Guide and then layer these extras in where they make sense.

2) Speed work in a marathon build: what to keep, what to avoid

A common marathon trap is doing everything at marathon pace. Long tempos, long intervals, long runs, repeat. That approach can build endurance, but it often lets leg turnover fade.

Shorter, faster reps (think 200s, 400s, 600s, 800s) do something marathon pacing cannot:

• They teach your body to run faster than race pace.
• They improve coordination and rhythm.
• They make marathon pace feel smoother because it is no longer the “fastest” thing you practice.

What “speed work” can look like (marathon-friendly)

You do not need to sprint. In many marathon builds, the most useful speed is controlled, repeatable speed.

A practical example:

• 12–16 × 200m at roughly 5K effort, with 200m jog recovery.

You can also use short reps with shorter recoveries to make it more continuous and mentally demanding, for example 300m repeats with a short float or jog in between. The key is staying fast enough to train turnover, while not turning it into a race.

How fast should you run?

General guidance: aim for a pace you could associate with around 5K effort for short reps, not all-out. If you want help translating effort into numbers, use the running pace calculator to sanity-check what “fast but controlled” looks like for you.

Where it fits in the week

One common sequencing idea is:

• A longer marathon-focused session midweek (long intervals or tempo).
• A shorter, faster-than-marathon “speed touch” later in the week.
• Enough room to arrive at the long run ready to do the job.

This is not a rigid template. It is a reminder that speed belongs in the marathon build, just placed intelligently.

3) Strides: the simplest way to stay snappy without digging a hole

Strides are one of the best “bang for your buck” add-ons because they keep mechanics sharp without adding much fatigue, as long as you do them correctly.

The biggest misconception: strides are not about proving how fast you can run. They are about practicing smooth, tall, efficient running when you are a little tired.

How to do strides well

A solid default:

• 6–10 strides
• 20–30 seconds each
• Smooth acceleration to about 80% effort
• About 90 seconds easy walk/jog recovery

Think “controlled fast.” You should finish each stride feeling like you could do another one with good form.

Use landmarks, not your watch

Strides work best by feel. Pick landmarks (mailbox, tree, light pole) and build speed gradually between them. This helps you stay focused on posture, arm drive, and relaxation instead of chasing a number.

How often?

For many runners:

• 1–2 times per week is plenty.

Leave some easy days truly easy. Strides are a tool, not a daily requirement.

If you want more context on keeping easy days easy, the principles in Easy Run Pace and Recovery Days pair nicely with this approach.

4) Core and stability: marathon posture is earned

Late in a marathon, you can often spot fatigue before you see pace changes. The posture goes first:

• Shoulders round.
• Hips sit.
• Eyes drop to the ground.
• The stride shortens.

Some of that is normal fatigue. Some of it is strength. Core work helps you keep your form closer to your best form when you are tired.

Core is bigger than abs

Think of your “core” as a 360-degree system:

• Front of the trunk
• Sides (obliques)
• Hips and pelvis
• Back (often forgotten)

If you only chase crunches, you miss the support system that keeps you upright at mile 23.

A simple core starting point

A practical entry point is short and consistent:

• About 10 minutes, a few times per week.
• Emphasize planks and variations (front plank, side plank, back-bridge style holds).
• Use controlled, clean reps, not sloppy volume.

Dynamic variations (like controlled hip dips in a side plank) can train strength while also encouraging mobility through areas that get tight in runners.

For more ideas you can integrate without turning your week into a second job, see Runners Core and Weight Exercises.

5) Recovery tools: foam rolling, mobility, stretching, and when less is more

Recovery tools are helpful when they reduce stiffness and support consistency. They are not helpful when they turn into an extra stressor.

Foam rolling: timing and restraint

A smart default:

• Foam roll after runs, when muscles are warm and blood flow is already high.

You can also use foam rolling in the evening if you sit all day, especially to “undo” desk posture (for example, gently opening the front of the hips and chest). Just avoid turning it into a daily pain ritual.

Important idea: foam rolling too much is real. Grinding the same sore spot for a long time can leave you more irritated than improved.

Stretching: consider the order

If you are doing both:

• Foam roll first, then stretch.

Stretching can be a useful cool-down, especially for runners who tend to run tight. Keep it calm and controlled.

Dynamic stretching: slow beats aggressive

Dynamic work can help pre-workout or post-run, but it should be controlled. Avoid violent leg swings or “jerky” movements that feel like you are forcing range of motion.

One simple example: walking knee hugs (and gentle variations that open hips and quads) done slowly with good alignment.

Massage vs ART: not the same thing

A deep tissue massage can be restorative. ART (active release techniques) is typically more specific and more intense, and it is usually used when you are targeting a particular problem area. Both can be useful, but they serve different purposes.

General guidance: if you are chasing a persistent hot spot, a qualified professional can help you determine what is actually going on, and what technique is appropriate.

6) Sleep: the recovery lever most runners underuse

If you want one add-on that improves almost everything, protect your sleep.

Sleep is where training becomes fitness. It is also where many runners quietly lose ground in marathon builds, especially when volume and intensity rise.

What matters most: consistency

Instead of obsessing over a perfect number, focus on:

• A repeatable bedtime and wake time.
• A wind-down routine (less screen time right before bed is a strong starting point).
• Avoiding the habit of waking up and immediately checking your phone.

Some runners find sleep trackers useful for awareness, especially if they suspect restless sleep. Others find the data distracting. Use it only if it helps behavior.

What about naps?

Naps can help some runners. They can also backfire if a nap ruins night sleep. If naps leave you groggy, or if they push bedtime later, prioritize the overnight block.

A surprisingly useful alternative: 15–20 minutes of quiet rest (eyes closed, no screens), even if you do not fall asleep.

7) Strength and drills: build a body that can hold marathon form

Strength training is not just “extra work.” Done well, it is resilience work.

Start small and keep it repeatable

If strength is new to you:

• Start with two sessions per week, roughly 20–30 minutes.
• Keep it full-body, not body-part splits.
• Focus on movements that support running: hips, posterior chain, trunk stability, and single-leg control.

If you already lift, one way to make strength more running-specific is adding more single-leg work, since running is essentially a series of one-leg landings.

Don’t let strength sabotage your long run

The common mistake is doing a heavy lift because you “need to check the box,” then showing up flat for the long run. In marathon training, the long run and key workouts typically carry the most value.

Strength should serve those sessions, not steal from them.

8) Common mistakes with marathon add-ons

• Dropping speed work completely and only practicing marathon pace.
• Turning strides into sprints, or doing them with sloppy form.
• Adding too many extras at once, then wondering why workouts feel harder.
• Foam rolling so aggressively or so long that you feel beat up the next day.
• Stretching or doing dynamic drills too forcefully instead of controlled and calm.
• Lifting heavy right before the long run just to “get it done.”
• Treating training like a checklist instead of adapting to how you feel that day.
• Ignoring sleep until you are already deep into fatigue.

9) Safety and when to get help

General guidance: soreness and fatigue are normal in marathon training, but sharp pain, worsening symptoms, or pain that changes your stride is a sign to step back.

Consider getting help if:

• Pain persists for more than a few days despite reduced load.
• You are compensating, limping, or altering form to keep running.
• Symptoms worsen each run instead of easing as you warm up.
• You are unsure how to modify training without losing momentum.

A qualified professional can help assess what is happening. A coach can help adjust training so you keep moving forward without repeatedly re-opening the same issue.

10) Putting it together: a realistic weekly add-on plan

Here’s a simple way to layer supplemental work into a marathon week without turning your schedule into chaos.

A practical “extras” framework (pick what fits)

1. Keep one fast touch each week
   Example: short reps (like 200s) at controlled fast effort.
2. Add strides 1–2 times per week
   6–10 × 20–30 seconds, smooth acceleration, plenty of recovery.
3. Do short core work a few times per week
   10 minutes is enough if you do it consistently.
4. Strength train twice per week, short and focused
   20–30 minutes, full-body, prioritize single-leg stability and trunk control.
5. Use recovery tools with restraint
   Foam roll after runs, then stretch if it helps. Keep dynamic mobility controlled.
6. Protect sleep like it’s a workout
   Consistency beats perfection.

If you want an experienced set of eyes on how to fit these into your own schedule, you can browse our roster of coaches and choose someone who matches your goals and training style.

FAQ

Do I really need speed work for a marathon?
Most runners benefit from some faster-than-marathon running, because it supports leg turnover and efficiency. You do not need to sprint, but short controlled reps can help marathon pace feel smoother.

What’s the difference between strides and intervals?
Intervals are a workout with a training goal and accumulating fatigue. Strides are form-focused accelerations with plenty of recovery, designed to keep you feeling quick without draining you.

How many times per week should I do strides?
Common guidance is 1–2 times per week. Keep them smooth, controlled, and separated from your hardest sessions when possible.

If I only have time for one add-on, what should it be?
Sleep is the highest impact for most runners. If you want a training add-on, strides are a close second because they’re simple and low-cost when done correctly.

When should I foam roll, before or after running?
Many runners do well foam rolling after runs when muscles are warm. If you’re also stretching, foam roll first, then stretch.

How much strength training is enough during marathon training?
Two short sessions per week (20–30 minutes) is a strong starting point. The goal is consistency and durability, not exhaustion.

Can an online running coach help with supplemental marathon training?
Yes. An online running coach can help you choose the right extras, place them in the week intelligently, and adjust based on fatigue so your key workouts and long runs stay productive.