Speed Work for Marathon Training: A Practical Progression

By RunDoyen.
Featuring coaching insights from Jacob Phillips.

RunDoyen connects runners with expert online running coaches and race-focused training plans built around real goals, real schedules, and long-term progress.

TL;DR

• Marathon speed work is not the same as all-out sprinting. Think controlled running faster than marathon pace, often around 5K, 10K, or half-marathon effort.
• Strides are one of the simplest places to start. Short repetitions of roughly 20 seconds can reintroduce faster, smoother running without turning the day into a major workout.
• Hills, one-minute fartlek repetitions, and short track intervals can build on that foundation.
• Early in a marathon cycle, faster running can receive more emphasis. As race-specific work grows, speed can shift into maintenance rather than disappear.
• The objective is not to replace long runs or marathon-pace training. It is to become smoother and more efficient across a wider range of paces.

For a marathon build that balances faster running with long runs and race-specific work, Get Matched with a RunDoyen coach who can shape training around your current fitness, race goal, and schedule.

Table of Contents

1. What speed work means for a marathon runner
2. Why faster running can support marathon pace
3. A practical progression for marathon speed work
4. How to fit speed into a marathon training cycle
5. Common mistakes with marathon speed work
6. Safety and when to get help
7. Keep speed in the marathon toolbox

What Speed Work Means for a Marathon Runner

When runners hear “speed work,” it is easy to picture maximal sprinting. That is not the only useful definition, especially during marathon preparation.

For a marathoner, speed work can simply mean controlled running at an effort faster than marathon pace. Depending on the athlete and the workout, that may resemble 5K effort, 10K effort, or even half-marathon effort.

The distinction matters because marathon training already contains a lot of slower and moderate running. Long runs build the ability to cover distance. Marathon-pace sessions develop familiarity with race-specific rhythm. Easy mileage supports the overall volume needed to prepare for 26.2 miles.

Faster running fills a different role.

Instead of spending an entire marathon block locked into goal pace, the runner occasionally practices turning the legs over more quickly while staying relaxed and mechanically smooth.

That is why speed work can complement marathon training plans rather than compete with the rest of the program.

A useful coaching cue is to think less about forcing a number on the watch and more about what the running looks and feels like. The athlete should be moving fast, but still controlled. Smoothness, rhythm, and efficient form matter more than proving how hard one repetition can be.

Why Faster Running Can Support Marathon Pace

One simple way to understand speed work is through contrast.

Suppose a runner hopes to race the marathon near 7:00 per mile. If nearly every demanding session happens at or near that pace, 7:00 pace always represents the faster end of the athlete’s regular training range.

Now imagine that the runner periodically touches controlled repetitions closer to 6:30, 6:15, or even 6:00 pace when appropriate for their ability. Marathon pace is no longer the fastest rhythm the runner practices.

That does not eliminate the need to train specifically at 7:00 pace. The runner still needs marathon-specific workouts, long-run development, fueling practice, and the ability to hold goal effort while fatigued.

The faster work simply broadens the range of speeds the runner is comfortable using.

This is one reason a marathon build should not become 12 to 20 weeks of goal pace repeated in slightly different formats. The broader structure described in the Marathon Training Guide still matters. Speed development is one layer within that larger system.

The same concept applies even when pace is not the main target. A runner can use effort instead. The goal is to spend brief periods moving clearly faster than normal marathon rhythm without turning every repetition into a race.

A Practical Progression for Marathon Speed Work

A simple progression keeps faster running manageable and gives the athlete time to become comfortable before the sessions become more demanding.

1. Start with strides.
   After an easy run, add roughly 4 to 10 repetitions of about 20 seconds. Warm up first. The first repetitions can feel around 5K effort, then become a little quicker as the body settles into the movement. The priority is smooth, relaxed running rather than sprinting.
2. Add controlled hill repetitions.
   Once strides feel normal, use a moderate hill that allows normal running form. Start with approximately 8 one-minute repetitions, running uphill hard and strong but in control, then jogging easily downhill. A later session might progress to 10 repetitions, then 12. The transcript example described a hill around 3 to 5 percent grade, while emphasizing that exact grade matters less than finding an incline that lets the runner move well. For more context on this type of session, see hill training for runners.
3. Introduce short fartlek or track repetitions.
   A road-based option is 10 to 12 repetitions of one minute fast and one minute easy. Over later sessions, that can progress toward 12 to 16 and eventually 16 to 20 repetitions. The fast minute remains controlled, generally around 5K to 10K-type effort rather than an all-out sprint. On a track, another option is 16 to 20 repetitions of 200 meters faster with a 200-meter jog.
4. Move toward longer race-specific work.
   After several weeks building comfort with faster running, half-marathon-pace and marathon-pace workouts can become more prominent. The runner now brings a foundation of turnover and efficiency into those longer efforts.
5. Maintain speed instead of abandoning it.
   Once race-specific training dominates the schedule, periodically return to hills, short fartlek, or similar faster work. One coaching pattern is to revisit that speed approximately every third or fourth quality session.

The key is the sequence. Strides introduce faster mechanics with very little duration. Hills add resistance and rhythm. Short repetitions extend the faster running. Only then does the emphasis shift more heavily toward longer marathon-specific sessions.

How to Fit Speed Into a Marathon Training Cycle

A marathon cycle usually contains competing priorities. There are only so many demanding sessions a runner can absorb, which means speed work has to fit around the long run and other quality training.

One approach is to emphasize speed more during the first four to eight weeks of a longer marathon build. During this period, the runner can establish the habit of strides, hills, and short repetitions before the heaviest marathon-specific work arrives.

Strides can appear more frequently than a full interval workout. One coaching approach is to use them twice per week, often after easy running.

For example, a runner might perform a small set of strides the day before a tempo-style workout and another set the day before the long run. A specific athlete example used eight repetitions of 30 seconds every Thursday with no prescribed pace. The instruction stayed simple: be smooth, fluid, and efficient.

That is an important distinction. Strides do not need to become another workout that the athlete has to “win.”

The harder speed-oriented session can occur less frequently. Early in a build, that could mean hill repeats one week and short fartlek another. Later, once half-marathon and marathon-specific sessions take priority, faster work can return periodically as a maintenance stimulus.

Easy days still need to remain easy enough to support those sessions. The principles in easy run pace and recovery days become especially relevant when a marathon schedule contains both faster running and demanding long runs.

A simple three-workout rotation later in the cycle might look like this conceptually:

• Half-marathon-pace quality session
• Marathon-pace quality session
• Shorter speed refresh using hills or one-minute repetitions

Then the cycle can repeat with different durations or volumes appropriate to the runner.

This is not a universal prescription. The important coaching logic is that faster running stays present without displacing the workouts most specific to the marathon.

Common Mistakes With Marathon Speed Work

• Treating every fast repetition like a sprint. The goal is controlled speed, good rhythm, and efficient movement, not maximal effort.
• Skipping the warm-up. Short repetitions may look simple, but they should come after enough easy running to prepare the body for faster movement.
• Chasing pace during strides. A stride is more useful when the runner stays smooth and relaxed than when they force an arbitrary watch reading.
• Adding too much speed at once. Going directly from no faster running to high-volume intervals misses the value of progressing through strides and shorter sessions first.
• Dropping speed completely once marathon-specific work begins. Faster running can become less frequent without vanishing from the program.
• Turning recovery days into moderate days. Adding quality work only helps when the rest of the schedule still allows adequate recovery.

Safety and When to Get Help

General guidance: Faster running increases training demand, so the appropriate starting point depends on current training history, recent consistency, and how well a runner is already handling normal mileage.

A runner who has not been doing any faster work can begin conservatively rather than jumping directly into a large interval session. Short strides after an established easy run are one possible entry point.

If pain is changing running form, worsening as a session continues, or making normal training difficult, stop treating the issue as something to push through. A qualified medical professional can evaluate symptoms that may require clinical attention.

Speed work also should not be forced into an already overloaded week. If fatigue is accumulating or normal easy running is no longer recovering well, adding more intensity may not be the appropriate next step.

Keep Speed in the Marathon Toolbox

The marathon rewards endurance, patience, fueling, and the ability to hold a sustainable effort for a long time. None of that makes faster running irrelevant.

A marathoner can benefit from being comfortable at more than one pace.

Start simply. Use strides to practice relaxed turnover. Progress to controlled hills or short fartlek repetitions. Build toward the longer half-marathon and marathon-specific sessions that define the heart of the training cycle. Then keep a small amount of faster running in the program so the quality does not disappear.

The aim is not to turn marathoners into sprinters. It is to help them arrive at marathon pace as smoother, more efficient runners.

For individualized guidance on how much speed work fits alongside your mileage, long runs, and race-specific sessions, Browse Coaches to learn about RunDoyen’s online running coaching options.

FAQ

Should marathon runners do speed work?
Speed work can be part of marathon preparation when it complements rather than replaces long runs and marathon-specific training. In this framework, “speed” means controlled running faster than marathon pace, not necessarily maximal sprinting.

What is the best speed workout to start with during marathon training?
Strides are a simple starting point. The coaching progression described here begins with roughly 4 to 10 repetitions of about 20 seconds after an easy warm-up, with the emphasis on smooth, relaxed movement.

How fast should marathon strides be?
The source guidance starts around 5K-type effort and allows the repetitions to become somewhat quicker as the runner warms into them. Pace itself is secondary to staying relaxed, smooth, and efficient.

How do hill repeats fit into marathon training?
Hill repeats can follow strides in a speed-development progression. One example begins with about eight one-minute uphill repetitions, then builds toward 10 and 12, with easy jogging downhill between repetitions.

Can I do marathon speed work without access to a track?
Yes. A road-based fartlek such as one minute fast followed by one minute easy can provide the same general opportunity to practice faster running. The coaching progression begins around 10 to 12 repetitions and can build gradually.

When should marathon training become more race-specific?
One approach is to use the first four to eight weeks of a longer build to establish faster, more efficient running, then place greater emphasis on marathon-specific work during roughly the final 12 weeks. The exact schedule depends on the athlete and overall length of the training cycle.

How can an online running coach help with marathon speed work?
An online running coach can organize faster running around the athlete’s long runs, current mileage, recovery needs, and race-specific sessions. Coaching can also help determine when speed should be developed, maintained, reduced, or progressed instead of treating every runner’s schedule the same way.