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Three weeks before the marathon, you do the opposite of everything that feels right. You run less. You sit around more. Your legs tingle, your head panics, and a voice whispers that you’re losing your form. This is exactly when the part of training that determines your race begins: tapering. And most hobby runners do it wrong.

Tapering: Running Less, Arriving Better

What is Tapering? Tapering is the planned reduction of training volume in the last two to three weeks before a competition. You significantly reduce the kilometers, but maintain the intensity. This allows your body to recover and translate the training stimuli of the previous months into performance on race day.

It’s not a shameful rest, but a controlled relief. The work of the previous months is done. Now it’s just about letting it all out.

The most well-known analysis comes from sports scientists Iñigo Mujika and Sabino Padilla. They compiled dozens of tapering studies and found an average performance gain of about three percent. That might not sound like much. On a four-hour marathon, it translates to about seven minutes, which you gain simply by not doing the wrong things in the last few weeks.

The mistake many hobby runners make: They see the last weeks as their last chance to build form. You don’t build form in this period. You just let it go.

What Happens in Your Body When You Slow Down

As soon as the volume decreases, three processes occur simultaneously. First, your glycogen stores are replenished. During intense training, they are chronically half-empty because you deplete them faster than your body can refill them. During the taper phase, the muscles are loaded and have significantly more readily available energy on race day.

Secondly, the microdamage in the muscle fibers, which has accumulated over weeks of high stress, is repaired. Thirdly, the blood values calm down: Inflammation markers decrease, the hormonal balance stabilizes, and the immune system relaxes. That’s why many people feel a bit off during the taper week. The body switches from chronic stress to repair mode.

You won’t be training less in these weeks. You’ll be recovering, which is more valuable on race day. Whoever is cleanly entering a season learns this mechanism early on: Breaks are part of the training, not the gap between them.

Volume Down, Intensity Up: The Two Levers

The most expensive tapering mistake is also the most obvious: Everything slower and shorter. This feels soothing, but it robs your legs of rhythm. The research is pretty clear here. You reduce the volume and maintain the intensity.

Specifically, this means: According to the analyzed studies, the total volume in the optimal taper phase decreases by 40 to 60 percent. The number of weekly running units remains almost the same, you just make them shorter. And a short block at marathon pace is still part of it, so your body doesn’t forget the race pace. Three times a kilometer at target pace no longer provides a training stimulus. It just reminds your legs of the race pace.

Whoever has periodized their season cleanly, for them tapering is just the logical final block. Whoever, on the other hand, has been going full throttle until two weeks before the start, can only save what can be saved with the best taper plan.

The Three-Week Marathon Plan

Three Weeks Before: The Final Long Run. 28 to 32 kilometers at a relaxed pace. This is your last major training session. After this, the volume will only decrease.

Two Weeks Before: First Reduction. Total volume drops to about 70 to 80 percent of your normal weekly volume. A short tempo run at marathon pace remains. Long, slow runs are now a thing of the past.

Last Week: Significantly Shorter Runs. Volume at 40 to 50 percent. Two to three short, easy runs, plus a few hill sprints to keep your legs fresh. Two days before the race, a short run of 20 to 30 minutes with three to four hill sprints. No more.

Race Day. You wake up rested, slightly nervous, and with full energy stores. This exact feeling is the goal of the tapering period.

Taper Tantrum: Why You Feel Miserable and It Still Works

Phantom knee pain, poor sleep, restlessness, the feeling of suddenly becoming unfit. Runners have a name for this: taper tantrum, the tapering rage. Almost everyone who seriously trains for a marathon experiences this phase.

The reason is half physical, half mental. Physically, you suddenly feel the fatigue that you haven’t noticed during the weeks of training stress. Mentally, you miss the daily outlet that running provided. Now you’re taking it away. The phantom pain is often just heightened awareness of your body.

The important thing: This feeling is a good sign, not a warning. It means that your taper is working. You can’t get three percent more performance without a few uncomfortable days beforehand.

Typical Tapering Mistakes

Panic Training. Three days before the start, one more hard session because your conscience is nagging. It brings no additional form and costs recovery. Let it go.

Trying Something New. New shoes, new gel, new breakfast: The tapering phase is the worst time for experiments. Everything that touches your body on race day should be tried during training.

Completely Removing Intensity. Just jogging slowly will leave you with heavy, dragging legs at the start. Short tempo runs in the marathon pace should be included until the very end.

Too Short or No Tapering at All. One or two easy days are not a taper. For a marathon, you need two to three weeks of structured volume reduction.