Marathon tapering should leave you rested, sharp and ready to race. However, reducing your mileage too late, cutting every faster effort or completing one final fitness test can carry unnecessary fatigue into race day.
The final three weeks before a marathon create a strange problem: the fitter you become, the harder it is to stop proving it.
You have spent months building mileage, completing long runs and organising entire weekends around training. Then, just as race day approaches, your plan suddenly asks you to run less.
Naturally, many runners assume this is a trap.
A missed run feels like lost fitness. An extra rest day creates guilt. The temptation to squeeze in one final long run becomes almost irresistible.
But marathon tapering is not lost training time. It is the phase that allows the training you have already completed to produce its full effect.
Fitness does not disappear when your mileage drops for two or three weeks. Accumulated fatigue does – provided you reduce your training in the right way.
THE QUICK ANSWER
Marathon tapering normally begins two to three weeks before race day.
During this period, you should:
- Reduce your weekly mileage progressively
- Keep running regularly
- Retain small amounts of marathon-pace or faster running
- Shorten your long run
- Reduce demanding strength training
- Prioritise sleep, nutrition and recovery
- Avoid trying to gain any last-minute fitness
Research suggests that reducing training volume by approximately 41–60% while largely maintaining training intensity and frequency can improve endurance performance. A 2023 systematic review found that tapers lasting up to 21 days produced performance benefits without meaningful reductions in VO₂ max or running economy.
The aim is not to stop training. It is to remove enough fatigue for your existing fitness to become visible.
WHAT IS MARATHON TAPERING?
Marathon tapering is a planned reduction in training load before race day.
Training load is influenced by several factors:
- The distance you run
- How frequently you run
- How hard you run
- The duration of individual sessions
- Strength training and cross-training
- The total stress surrounding your training
A successful marathon taper reduces the overall workload while preserving enough intensity and routine to keep your legs responsive.
This is different from complete rest.
Stopping all running for two or three weeks would be detraining. A taper continues to provide your body with a familiar training stimulus – there is simply much less of it.
WHY DOES TAPERING IMPROVE MARATHON PERFORMANCE?
Every training session creates two overlapping effects: fitness and fatigue.
Fitness develops gradually as your body adapts to repeated training. Fatigue accumulates more quickly through muscle damage, depleted energy stores, disrupted sleep and the general strain of sustained marathon mileage.
At the peak of a training block, you may therefore be fitter than ever while feeling slower than expected.
The taper does not create a new level of fitness. It allows the fatigue covering that fitness to fall away.
Research examining the physiological effects of tapering has reported:
- Increased muscle glycogen availability
- Reduced markers of training-related muscle damage
- Improvements in muscular strength and power
- Better sleep and mood
- A lower perception of effort
- Recovery of previously suppressed physiological capacities
Your aerobic adaptations do not suddenly vanish because you run fewer miles for a fortnight. You continue running, retain some intensity and give your body time to absorb the work already completed.
WILL YOU LOSE FITNESS DURING A MARATHON TAPER?
A properly structured taper is very unlikely to produce a meaningful loss of marathon fitness.
Complete training cessation can begin to reduce some aspects of aerobic fitness within a couple of weeks. Marathon tapering, however, is not complete training cessation.
You are still running. You are still producing an aerobic stimulus. You are still reminding your legs how race pace feels.
The difference is that you are completing shorter sessions and creating considerably less fatigue.
A 2023 meta-analysis found that tapering improved time-trial and time-to-exhaustion performance without producing significant changes in VO₂ max or movement economy. In other words, athletes often performed better even though their measured aerobic capacity did not increase.
This is the point of the taper: you do not need to become fitter during race week. You need to arrive capable of using the fitness you already have.
HOW LONG SHOULD A MARATHON TAPER LAST?
Most recreational runners will benefit from a taper lasting between two and three weeks.
The appropriate duration depends on:
- Your peak weekly mileage
- The length and difficulty of your training block
- Your running experience
- Your recovery rate
- Whether you are carrying any minor injuries
- How quickly you tend to feel flat when mileage drops
Runners completing high-volume training or carrying substantial fatigue may benefit from a full three-week taper. Lower-mileage runners who recover quickly may prefer something closer to two weeks.
An observational study analysing more than 158,000 recreational marathon runners found that disciplined three-week tapers were associated with faster marathon performances than minimal tapers. The median benefit was approximately 5 minutes 32 seconds, or 2.6%.
That does not prove that a three-week taper will make every runner 2.6% faster. Faster and more experienced runners may also be more likely to follow structured tapers. However, the findings reinforce an important principle: progressively reducing mileage is generally more effective than maintaining heavy training until race week.
HOW MUCH SHOULD YOU REDUCE YOUR MILEAGE?
The research does not support one exact percentage for every runner. However, reducing total training volume by approximately 41–60% across the taper appears effective for many endurance athletes.
This reduction should be progressive.
You do not need to cut your mileage by 60% on the first day and hold it there. Instead, allow your weekly volume and long-run distance to fall as race day approaches.
A practical marathon taper might look like this:
| Training phase | Suggested mileage | Long run | Quality running |
|---|---|---|---|
| Final peak week | 100% | Final planned longest run | Normal training |
| 15–21 days before race | 70–80% of peak | Around 60–75% of your longest run | One controlled session with fewer repetitions |
| 8–14 days before race | 50–65% of peak | Around 40–60% of your longest run | Short marathon-pace work or strides |
| Race week | 25–35% of peak before the race | No traditional long run | Brief race-pace reminders and strides |
Race-week mileage percentages do not include the marathon itself.
If your peak mileage was 40 miles per week, this could mean approximately:
- 28–32 miles during the first taper week
- 20–26 miles during the second taper week
- 10–14 miles before the marathon during race week
These are examples, not compulsory targets. Your previous training, running frequency and recovery should guide the final numbers.
A PRACTICAL 3-WEEK MARATHON TAPER PLAN
THREE WEEKS BEFORE THE MARATHON
Your final longest run will usually fall around three weeks before race day, although some plans place it slightly earlier or later.
Once that run is complete, begin reducing your total mileage.
Keep most of your usual running days, but shorten the individual sessions. If you normally run five times per week, you may continue running four or five times rather than suddenly dropping to twice.
Your quality session can remain relatively familiar, but reduce the total workload. For example, instead of completing six one-mile repetitions, you might complete four. Instead of a lengthy marathon-pace block, use several shorter sections with easy running between them.
The session should maintain rhythm – not require several days of recovery.
TWO WEEKS BEFORE THE MARATHON
Mileage should continue to fall.
Your weekend long run might last between 60 and 100 minutes, depending on your normal mileage, experience and race plan. It should feel controlled and should not attempt to recreate marathon fatigue.
Include a small amount of marathon-pace running if it normally helps you feel confident. You could, for example, add two or three short marathon-pace sections within an otherwise easy run.
This is also the point to reduce demanding lower-body strength training. Keep movements familiar, reduce the number of sets and avoid exercises that normally leave you sore.
RACE WEEK
Race week is about maintaining movement without creating fatigue.
For a Sunday marathon, a four-run schedule could look like:
- Tuesday: 30–40 minutes easy with four short strides
- Thursday: 25–35 minutes including three short sections at marathon pace
- Saturday: 10–20-minute optional shakeout run
- Sunday: Marathon
Some runners feel better with complete rest on Saturday. Others prefer a brief run to settle their nerves and loosen their legs. Use the approach that has worked before shorter races.
Nothing completed during race week should require recovery.
SHOULD YOU KEEP SPEED WORK DURING THE TAPER?
You should retain some intensity, but substantially reduce its volume.
Removing every faster effort can leave some runners feeling flat. Continuing full interval sessions can leave them unnecessarily tired.
The middle ground is a smaller dose of familiar intensity.
Useful options include:
- Four to six relaxed 20-second strides
- Short sections at marathon pace
- A reduced interval session with longer recoveries
- Several minutes around threshold pace early in the taper
Avoid introducing unfamiliar speeds or trying to set training personal bests.
Your final session is not an examination of whether you are ready. The previous months have already answered that question.
WHAT SHOULD HAPPEN TO YOUR LONG RUN?
Your final longest run should normally be completed before the taper begins.
After that, the long run should become progressively shorter. The purpose is to maintain endurance and routine without recreating the muscle damage and recovery demands of peak training.
Trying to complete another 20-mile run one or two weeks before the marathon is unlikely to produce useful fitness in time. It is far more likely to carry fatigue, soreness or injury risk into race week.
If you missed your final long run through illness, work or injury, do not automatically move it closer to the race.
One missed session does not erase an entire training block. Attempting to compensate for it may do more harm than accepting that your preparation was imperfect – as almost every marathon build is.
SHOULD YOU CONTINUE STRENGTH TRAINING?
Strength training should also taper.
Two to three weeks before the race, begin reducing total sets and avoid training to failure. Keep the exercises familiar and focus on maintaining movement quality.
During the final week, avoid heavy lower-body lifting, demanding eccentric exercises and anything likely to create delayed muscle soreness.
A small amount of mobility, light activation work or gentle upper-body training may be fine if it forms part of your normal routine.
Race week is not the time to test a new gym class, chase a deadlift personal best or discover that walking lunges make stairs impossible.
SHOULD YOU EAT LESS WHEN YOUR MILEAGE DROPS?
Your energy expenditure will decrease during the marathon taper, but this does not mean you should dramatically reduce your food intake.
Recovery still requires energy. Your muscles are repairing, your glycogen stores are being replenished and your body is preparing for a demanding endurance event.
Continue eating regular meals containing:
- Carbohydrate
- Protein
- Fruit and vegetables
- Dietary fats
- Fluids and electrolytes appropriate to your needs
As race day approaches, carbohydrate should become increasingly important. Formal sports-nutrition guidance recommends increasing carbohydrate availability before endurance events lasting longer than 90 minutes.
You can read more in our guide to carb loading for runners.
Avoid compensating for reduced mileage by restricting food. Feeling slightly heavier during the final days can also reflect increased glycogen and its associated water storage – not a sudden loss of fitness.
Race week is about arriving fuelled, not achieving the lowest possible number on the scales.
SHOULD YOU PRACTISE YOUR RACE-DAY FUELLING?
The taper is not the ideal time for a completely new fuelling strategy, but your remaining runs can reinforce the plan you have already practised.
Confirm:
- Which breakfast you will eat
- When you will eat it
- Which gels or carbohydrate products you will carry
- How frequently you will take them
- Where water stations are located
- Whether your chosen products will be available on the course
Do not buy a new gel at the marathon expo and make it responsible for mile 20.
If you are still finalising your strategy, our guide to running energy gels explains how they work and when to take them.
WHY DO YOUR LEGS SOMETIMES FEEL WORSE DURING THE TAPER?
Many runners expect the taper to produce instant, effortless speed. Instead, their first reduced-mileage run feels heavy and uncoordinated.
This does not necessarily mean the taper is failing.
Your body may still be processing fatigue from the peak weeks. Changes in routine can also alter how your legs feel, while race-day nerves make you unusually attentive to every sensation.
Common taper experiences include:
- Heavy or flat legs
- Restlessness
- Difficulty trusting the plan
- Increased awareness of minor aches
- Worry about losing fitness
- Feeling unusually energetic one day and sluggish the next
- Repeatedly checking the weather forecast
These feelings often settle as race day approaches.
However, a sharp or worsening pain, swelling, an altered running gait or symptoms of illness should not be dismissed as ordinary taper anxiety. Adjust your training and seek appropriate medical or physiotherapy advice when necessary.
7 MARATHON TAPERING MISTAKES TO AVOID
1. REDUCING YOUR MILEAGE TOO LATE
Holding peak mileage until race week does not provide enough time for accumulated fatigue to fall.
2. STOPPING ALL INTENSITY
Removing every stride and faster effort may leave you feeling flat. Maintain small, controlled doses of familiar intensity.
3. COMPLETING ONE FINAL FITNESS TEST
A hard 10K, extended marathon-pace run or extra 20-miler will not transform your fitness. It may transform how tired you feel.
4. REPLACING RUNNING WITH EXTRA CROSS-TRAINING
Running fewer miles does not create spare training capacity that must be filled with cycling, gym classes or lengthy walks.
5. DRAMATICALLY REDUCING CARBOHYDRATE
Lower mileage does not mean carbohydrates have stopped mattering. The taper should support recovery and glycogen storage.
6. CHANGING YOUR SHOES, KIT OR NUTRITION
Use products you have already tested. Race week is a poor laboratory.
7. PANICKING ABOUT EVERY BAD RUN
One sluggish taper run cannot remove months of adaptation. Judge the training block as a whole rather than using a single run as a forecast of race day.
THE RUNNER’S JOURNAL TAKEAWAY
Marathon tapering can feel uncomfortable because it asks runners to trust work that has already been completed.
You cannot build meaningful new marathon fitness during the final few days. You can, however, hide your existing fitness beneath unnecessary fatigue.
Reduce your mileage progressively. Keep a small amount of familiar intensity. Shorten the long run. Eat enough, sleep whenever possible and resist the urge to prove that you are ready.
The taper is not the absence of training.
It is the final part of it.
MARATHON TAPERING: FREQUENTLY ASKED QUESTIONS
HOW LONG SHOULD YOU TAPER FOR A MARATHON?
Most recreational runners taper for two to three weeks. Runners completing higher mileage or carrying substantial fatigue may benefit from the full three weeks, while some lower-mileage runners prefer a shorter taper.
HOW MUCH SHOULD YOU REDUCE MILEAGE DURING A MARATHON TAPER?
Research supports an overall reduction of approximately 41–60% in training volume. A practical approach is to run around 70–80% of peak mileage during the first taper week, 50–65% during the second and 25–35% before the race during marathon week.
WILL TWO WEEKS OF LOWER MILEAGE REDUCE MY FITNESS?
A structured taper should not meaningfully reduce marathon fitness because you continue running and retain some intensity. Complete inactivity is different from tapering.
WHEN SHOULD YOUR FINAL LONG RUN BE?
The final longest run is commonly completed around three weeks before the marathon. The exact timing depends on the plan, experience and recovery rate of the runner.
SHOULD YOU RUN THE DAY BEFORE A MARATHON?
You can rest or complete a short 10–20-minute shakeout run. Choose whichever approach has previously helped you feel relaxed and responsive.
IS IT NORMAL TO FEEL HEAVY DURING THE TAPER?
Yes. Heavy or flat legs are common, particularly during the early taper. They do not automatically indicate lost fitness. Sharp, worsening or gait-altering pain should be treated differently.
SHOULD YOU CARB LOAD DURING THE TAPER?
Carbohydrate intake should remain sufficient throughout the taper, with a more deliberate carbohydrate-loading period during the final 24–48 hours where appropriate. Your strategy should be practised and adjusted to your body size, tolerance and dietary needs.
CAN YOU MAKE UP A MISSED LONG RUN DURING THE TAPER?
Usually, no. Moving a missed long run closer to the marathon may create fatigue without allowing enough time for useful adaptation. Consider the consistency of the whole training block rather than one missed session.
Related Reading
- 7 Warning Signs Your Weekly Running Mileage Is Too High
- How to Combine Running and Strength Training
- Signs of Underfuelling in Runners
- Legs Feel Heavy but Not Sore?
REFERENCES
- Wang Z, Wang YT, Gao W, Zhong Y. Effects of tapering on performance in endurance athletes: A systematic review and meta-analysis. PLOS ONE. 2023.
- Bosquet L, Montpetit J, Arvisais D, Mujika I. Effects of tapering on performance: a meta-analysis. Medicine & Science in Sports & Exercise. 2007.
- Smyth B, Lawlor A. Longer disciplined tapers improve marathon performance for recreational runners. Frontiers in Sports and Active Living. 2021.
- Mujika I, Padilla S. Scientific bases for precompetition tapering strategies. Medicine & Science in Sports & Exercise. 2003.
- Mujika I, Padilla S, Pyne D, Busso T. Physiological changes associated with the pre-event taper in athletes. Sports Medicine. 2004.
- Thomas DT, Erdman KA, Burke LM. Nutrition and Athletic Performance. Medicine & Science in Sports & Exercise. 2016.
This article provides general educational information and is not an individual training or medical prescription. Adjust your taper to your experience, health and training history, and seek professional advice for persistent pain, illness or injury.
