Marathon Taper: How to Train (and Rest) in the Final Weeks Before Race Day
After months of building mileage, the marathon taper asks you to do something that feels deeply counterintuitive: run less. For many runners this is the hardest part of the entire training block—not physically, but mentally. Done properly, tapering is what lets all the training you've already banked actually show up on race day.
| Variable | What to do |
|---|---|
| Duration | 8–14 days works best; for a marathon, most runners use a fuller 2–3 week taper |
| Volume | Reduce by roughly 41–60%, tapering off gradually rather than all at once |
| Intensity | Keep it largely unchanged — short efforts at race pace or faster stay in the plan |
| Frequency | Keep it largely unchanged — fewer minutes per run, not fewer runs per week |
What Tapering Actually Is
Tapering is a planned, progressive reduction in training volume in the days or weeks before a race, while keeping some intensity in the legs. It is not the same as rest, and it isn't about doing nothing—it's about doing less of the same things that built your fitness, at the same effort, so your body has time to absorb months of training.
Why Cutting Volume (Not Intensity) Works
Heavy marathon training accumulates fatigue faster than it builds fitness in the short term—the benefits of a hard session don't show up immediately, they show up once you've recovered from it. A taper is designed to let that recovery finally catch up, without losing the fitness itself. Three things are going on at once:
- Glycogen stores top up. Weeks of high mileage keep your muscle glycogen partially depleted much of the time. Reduced volume, combined with your normal carbohydrate intake, lets stores rebuild toward their fuller capacity ahead of race day—the same underlying process that a dedicated carb-loading protocol in the final days pushes further still.
- Muscle micro-damage repairs. Months of long runs and harder sessions leave accumulated microscopic muscle damage. Lower volume gives repair processes time to finish the job properly rather than constantly playing catch-up.
- The nervous and hormonal systems reset. Heavy training suppresses some markers of recovery capacity and immune function. A taper allows these to normalise, which is part of why runners often report feeling stronger and springier in the final week.
Crucially, this only works if intensity is preserved. Cutting volume and intensity together removes the stimulus that keeps your neuromuscular system sharp, which is why the taper research consistently favours reducing how much you run, not how hard the remaining sessions feel.
A Week-by-Week Structure for the Final Three Weeks
3 weeks out
- Reduce total volume by roughly 20–25% from your peak week
- Keep your long run, but shorten it to around 60–75% of your recent peak distance
- Keep one session with race-pace segments to maintain feel for marathon effort
2 weeks out
- Reduce total volume by roughly 40–50% from peak
- Long run shortens further, to around 40–50% of peak distance, run comfortably
- One shorter session with race-pace efforts or strides, kept easy overall
Race week
- Reduce total volume by roughly 60–75% from peak — this is the biggest single drop
- Short, easy runs with a handful of race-pace strides to keep legs primed
- Last run of any real length 2–3 days before the race; the final day or two should be a rest day or a very short shakeout jog only
These percentages are guides, not rules—adjust based on how your legs feel, but the direction (steadily less volume, unchanged intensity) should hold throughout.
What to Keep During the Taper
- Some race-pace running. Short efforts at marathon pace keep your legs and pacing sense sharp without adding meaningful fatigue.
- Strides. A handful of 15–20 second relaxed accelerations, once or twice a week, keep your neuromuscular system switched on.
- Normal daily activity. Walking, stairs, and everyday movement are fine and shouldn't be avoided out of over-caution.
Don't go fully sedentary. Complete rest for two or three weeks removes the very stimulus that's keeping your fitness maintained—the taper works by reducing load, not eliminating it.
Common Taper Mistakes
- Cramming in a last long run. Trying to "bank" extra fitness with a long run inside the final two weeks adds fatigue you won't recover from in time and increases injury risk for no real benefit.
- Going to zero. Cutting volume to almost nothing, rather than a graded reduction, can leave legs feeling flat and sluggish rather than sharp.
- Trying new shoes or gear. Race week is not the time to test anything untested—new shoes, new socks, new shorts. Wear kit you've already used on long runs.
- Trying new food. The same rule applies to nutrition; race-week meals and race-morning breakfast should all be things you've already tested in training.
- Panic-training. Feeling suddenly "unfit" in taper week and adding extra sessions to compensate is one of the most common ways runners undo weeks of good preparation.
Nutrition and Sleep During Taper
- Don't cut calories just because you're running less—your body is still repairing and building glycogen stores, and under-fuelling works against the point of tapering.
- Prioritise protein and carbohydrate-rich meals through the taper, building toward a structured carb-loading approach in the final 1–3 days before the race.
- Protect your sleep in the final week more than any other week of training—this is when the accumulated benefit of months of training gets consolidated.
- Limit alcohol and go easy on very rich or unfamiliar foods in the 48 hours before race day to avoid any unnecessary digestive disruption.
Frequently Asked Questions
How long should a marathon taper be?
Most marathon plans use a 2–3 week taper. Research on tapering broadly supports 8–14 days as an effective minimum, with marathon training typically extending this slightly given the size of the training load being tapered from.
Should I stop running completely before a marathon?
No. Complete rest removes the stimulus that maintains your fitness. Keep running short and easy, with a little race-pace work, right up to the final day or two before the race.
Why do I feel sluggish during taper week?
This is common and usually temporary — often called a "taper tantrum." Reduced training load, combined with race-day nerves, can leave you feeling flat, restless or unusually emotional. It typically passes once you start running on race morning.
Is it normal to gain a little weight during taper?
Yes. Replenished glycogen stores hold extra water, which can show up as a small, temporary increase on the scales. This is a sign your fuelling is working, not a cause for concern.
Final Thoughts
The taper is where marathon training pays off, not where it happens. Trust the reduced mileage, keep a little intensity in your legs, protect your sleep and fuelling, and expect to feel a bit odd along the way. If you've put in the training, the taper's job is simply to let you arrive at the start line able to use all of it.