Tapering before a race: gaining freshness without losing your fitness

How do you reach a race as fresh as possible without losing what you have built?

Tapering is precisely the answer to that dilemma. It is a structured phase of reduced training load that brings accumulated fatigue down while preserving the physiological adaptations built over weeks or months of work. Done well, it gets you to race day at your peak.

Tapering means the planned, gradual reduction of training load in the final phase of preparation before a race. The aim is not to rest passively, but to let the body recover from the micro-traumas it has accumulated, regenerate damaged muscle fibres and rebuild energy stores, while keeping the physical qualities training has developed.

Tapering before a race: how do you arrive fresh on the day?

Reading time: ~7 min

1. What tapering is and why it is essential
2. The three levers to adjust during the final phase
3. A two-week taper plan before a marathon
4. Do and don’t while tapering
5. FAQ
6. Tapering, a key adjustment for arriving fresh

What tapering is and why it is essential

The underlying principle rests on a precise balance: you cut the volume of kilometres significantly, but you keep the intensity of your quality workouts. This is not a period of complete rest. It is an active transition towards performance.

How long the phase lasts depends on the distance you are preparing for. For a 10 km, a week is generally enough. For a half marathon, count on 10 days to 2 weeks. For a marathon or a long trail race, the optimal window is between 2 and 3 weeks. Those durations are not arbitrary: they correspond to the time needed to shed the fatigue before the physiological adaptations start going backwards.

The three levers to adjust during the final phase

Volume: the main variable to reduce

Volume is where the reduction should fall first. The recommendations converge on a drop of 30 to 60% from the peak load of your preparation. In practice, for a marathon runner used to stringing together 70 km weeks, the last week before the race can come down to 25 or 30 km, spread over several short outings.

The long run, which is often the pillar of a marathon preparation week, gets gradually shorter. Two weeks before the race it comes down to around 1 h 30. The following week, an outing of about an hour is enough. The last big long run should ideally sit around 12 days out, to give the body time to recover fully.

Intensity: what you must not cut

This is the most common and most costly mistake. Plenty of runners, afraid of getting injured or tired, drop every quality workout during the taper. The result is usually legs with no snap, a loss of feel for race pace and a kind of muscular lethargy on the day.

Intensity has to be maintained. What changes is the volume of work within each workout. If you usually did 12 repetitions of 400 m at VO2max speed, go down to 8 repetitions at the same speed. If you were stringing together 3 times 15 minutes at threshold, cut back gradually to 3 times 8 minutes, then 3 times 5 minutes as the race approaches. The signal sent to the muscles stays the same; the fatigue it generates is far lower.

Frequency: keep it as far as you can

The frequency of your workouts, meaning how many times a week you go out, should be maintained or reduced only slightly. Cutting several workouts abruptly breaks your neuromuscular habits and can create a feeling of losing condition, even when the adaptations are all still there physiologically. The aim is to keep the general rhythm of the training week and simply lighten the content of each session.

A two-week taper plan before a marathon

This table gives an indicative layout for a runner preparing a marathon, with a peak week of around 65-70 km behind them.

An example of a two-week taper before a race

Period	Type of workout	Indicative volume
14 to 12 days out	Last long run (25 km max) + easy running	About 40-45 km over the week
11 to 8 days out	45 min easy runs + short threshold workout (3x8 min)	About 30-35 km over the week
7 days out	An outing of about an hour, at a comfortable pace	Part of the final week
6 to 4 days out	Race pace reminders (3x3 km at marathon pace, 3 min recovery) + short easy runs	About 20-25 km over the week
3 to 2 days out	Light 30 min easy runs, or rest	Minimal volume
1 day out	A very easy 15 to 20 minute shakeout, with a few progressive strides	15-20 min
Race day	Race	Race day

Three days of complete rest, spread across the two weeks, are recommended. They should not be consecutive, and you can place them according to how tired you feel and to your own commitments.

Do and don’t while tapering

Do	Don’t
Reduce the volume gradually, week by week, with no abrupt break.	Stop running completely for 10 or 15 days, thinking that total rest is beneficial.
Keep at least one workout with high-intensity efforts each week.	Cut all intensity and stick to slow easy running until race day.
Keep your hydration right and look after the quality of your sleep.	Try to make up missed workouts by adding volume or intensity during the taper.
Start carbohydrate loading about 4 days before the race (around 8 to 10 g of carbohydrate per kilogram of body weight per day for a marathon).	Try new shoes, a new nutrition plan or radically change your sleep habits during this period.
Keep the same routines: times of day, training surfaces, usual kit.

FAQ

Can you taper before a trail race or an ultra?

Yes, and it is strongly recommended. For long trail races and ultras, the optimal length of the final phase is between 15 and 21 days. The logic stays the same: cut volume by 40 to 60%, keep the intensity, keep the frequency of outings. Some plans even include a slightly heavy week just before the taper, to get the most out of supercompensation during the recovery phase.

How do I know whether my taper is going well?

The positive signals are a gradual feeling of lightness in the legs, better sleep and a growing urge to run. It is normal to feel slightly restless or to have the impression of “losing fitness” at the start of a taper: that is a common psychological reaction, not a real physiological indicator. If the sensations at intensity stay good and the fatigue is dropping, the taper is on track.

Should I adapt the taper to my level?

Yes, up to a point. A beginner or recreational runner training 3 times a week does not need as long a taper as an athlete training 6 to 8 times a week. Accumulated fatigue is proportional to the total load of the preparation. A half marathon prepared at low volume will need one to two weeks of easing off, whereas a very well-trained runner will need the full two weeks to shed their chronic fatigue.

Tapering, a key adjustment for arriving fresh

Tapering is not a phase to improvise. It is a full component of the training plan, in the same way as the load weeks or the VO2max development blocks. Calibrated well, it gets you to the start line in the best physical and mental state, with full stores and regenerated muscles. Managed badly, it can wipe out weeks of work or, the other way round, leave residual fatigue that weighs on your performance. The key lies in reducing gradually, keeping the intensity and having the discipline not to give in to the temptation to “do more” when you start feeling good.

To plan, visualise and adjust your taper precisely, Slek is there to help you structure your preparation.