Tapering: Your Race Week Guide

What Is Tapering?

Tapering is the planned, systematic reduction of training volume in the days and weeks before a race. The goal is simple: arrive at the start line rested, recovered and ready to perform at your absolute best.

The key distinction is that you reduce volume (total mileage), not intensity. You still run some efforts at race pace or faster, but far fewer of them. This keeps your neuromuscular system sharp while allowing your body to fully recover from weeks or months of hard training.

Research consistently shows that a well-executed taper can improve race performance by 2-3%. For a 4-hour marathoner, that translates to roughly 5-7 minutes faster. Free speed, earned by doing less.

The Science of Tapering

When you train hard, you accumulate fatigue at the cellular level. Muscle fibers are damaged, glycogen stores are depleted, and your nervous system becomes fatigued. During a taper, your body finally gets the chance to repair and supercompensate.

• Glycogen supercompensation: With reduced training and normal eating, your muscles store more glycogen than usual. This extra fuel reserve is critical for races lasting over 90 minutes.
• Muscle repair: Micro-tears from training heal completely. Mitochondrial density increases. Your muscles become more powerful without the weight of accumulated fatigue.
• Hormonal balance: Cortisol (the stress hormone) drops while testosterone and growth hormone normalize. This hormonal shift enhances recovery and promotes a feeling of strength.
• Mental freshness: Reduced training volume lowers mental fatigue. You arrive at the race feeling hungry to run, not dreading another workout. This psychological readiness is often underestimated.
• Blood volume optimization: Your body maintains the expanded blood volume from training while reducing the inflammation that comes with heavy mileage. More oxygen delivery, less drag.

Tapering by Distance

Not every race requires the same taper. The longer the race, the longer the taper period. Here is what works for each major distance.

5K (taper: 5-7 days)

The 5K is short enough that you do not need an extended taper. Reduce your weekly volume by about 30-40% in the final week. Drop your long run and cut one quality session. Keep 2-3 short runs with a few strides at race pace. Two rest days before the race is plenty.

10K (taper: 7-10 days)

Similar approach but slightly longer. Reduce volume by 40% over 7-10 days. Your last hard workout should be 7-8 days before the race (something like 4x1000m at 10K pace). The final week is all easy running with strides, plus 1-2 complete rest days.

Half Marathon (taper: 10-14 days)

The half marathon demands a more structured taper. Reduce volume by about 50% over two weeks. Week one of the taper: cut mileage by 25-30% and do one moderate quality session. Week two: cut another 20-25% and keep only easy runs with a few race-pace strides.

Marathon (taper: 2-3 weeks)

The classic marathon taper is the longest and most critical. Your last long run (18-22 miles) should be 3 weeks before the race. From there, volume drops progressively: 75% in week one, 50% in week two, and 30-40% in race week. Keep 1-2 short quality sessions in the first taper week, then shift to easy running with strides only.

Sample Marathon Taper (Last 2 Weeks)

Here is a concrete day-by-day plan for the final two weeks before a marathon. Assume your peak weekly mileage was around 50 miles (80 km).

Week -2 (two weeks out) — ~35 miles / 56 km

• Monday: Rest or easy 3 miles.
• Tuesday: 6 miles easy with 4x800m at marathon pace (last quality session).
• Wednesday: 4 miles easy.
• Thursday: 5 miles easy with 6 strides.
• Friday: Rest.
• Saturday: 10 miles easy (your last "long" run).
• Sunday: 4 miles easy, relaxed.

Race Week — ~18 miles / 29 km (excluding race)

• Monday: 4 miles easy.
• Tuesday: 3 miles easy with 4 strides at race pace.
• Wednesday: 3 miles easy.
• Thursday: 2 miles easy with 2-3 short pickups.
• Friday: Complete rest or 15-minute shakeout jog.
• Saturday: 20-minute shakeout jog with 4 strides. Lay out all race gear.
• Sunday: Race day.

The Day Before Your Race

Race eve sets the tone. Follow this checklist so you can focus entirely on running when the gun goes off.

• Lay out everything: Shoes, socks, race bib, safety pins, watch, gels, sunglasses. Put them where you can see them. Nothing new on race day.
• Check logistics: Know your start time, corral, bag drop location, and how you are getting to the start. Plan to arrive at least 60 minutes early.
• Eat familiar foods: A carb-rich dinner you have eaten before. Pasta, rice, bread with lean protein. Avoid heavy sauces, fiber-rich vegetables, and anything spicy. Hydrate normally.
• Prepare mentally: Visualize the race. Review your pacing strategy. Set two goals: an A goal (ideal) and a B goal (realistic). Remind yourself of the training you have done.
• Sleep: Get to bed early but do not stress if you cannot fall asleep. The most important sleep is two nights before the race, not the night before. Pre-race nerves are normal and will not hurt your performance.

Taper Madness: Why You Feel Terrible

Almost every runner experiences it. You reduce your training and suddenly feel worse, not better. Welcome to taper madness.

• Phantom pains: Aches in your knees, hips, or ankles that were not there during peak training. Your body is hyper-aware now that it is not distracted by high mileage. These aches are almost always harmless.
• Heavy legs: Without the daily stimulus, your legs can feel sluggish and flat. This is normal. The freshness will arrive on race morning after your warm-up.
• Weight gain anxiety: You might gain 1-2 pounds during the taper. This is mostly water and glycogen, the exact fuel you need for race day. Do not cut calories.
• Restlessness and irritability: Your body is used to burning hundreds of extra calories daily. Suddenly having all that energy with nowhere to put it can make you anxious. Walk, stretch, or do light yoga.
• Self-doubt: The most insidious symptom. You start questioning your training, your goal pace, your ability to finish. This is fatigue talking, not reality. Trust the months of work you put in.

Tapering Mistakes to Avoid

• Training too hard in the final week: The number one mistake. That extra interval session will not make you fitter but can leave you fatigued and sore on race day. Resist the urge to squeeze in one more hard workout.
• Trying new shoes, gear or nutrition: Race week is not the time to experiment. Wear the shoes you trained in. Eat the gels you practiced with. Use the same socks, shorts, and watch. Everything should be tested and proven.
• Drastically changing your diet: Some runners carb-load by eating massive quantities of food they do not normally eat. Instead, simply increase the proportion of carbohydrates in your normal meals over the last 2-3 days. No need for a pasta mountain.
• Neglecting sleep: The taper weeks are when your body does its deepest repair. Prioritize 7-9 hours per night. Avoid screens before bed. If you feel like napping, nap. Your body is asking for rest.
• Cutting the taper short: Some runners get nervous and add a long run or hard session 4-5 days before the race. The research is clear: the full taper outperforms the truncated one. Be patient.
• Overthinking everything: Obsessing over every meal, every twinge, every weather forecast. Do what you can control and let go of what you cannot. You have done the work. Now let your body deliver.

Race Together

Racing with friends or a training group transforms the experience. Having someone to share the pre-race nerves, pace the early miles with, and celebrate at the finish line makes every race more meaningful. On CorrerJuntos you can find runners at your pace and sign up for races together across 58+ cities.

📋 More training guides

Training · 10K

10K Training Plan

Read guide →

Training · Half Marathon

Half Marathon Plan

Read guide →

Training · Marathon

Marathon Sub 3:30

Read guide →

Training · Intervals

Intervals & Fartlek

Read guide →

Training · Planning

Periodization

Read guide →

José Márquez Founder of CorrerJuntos · Sub-3:30 Marathoner

Runner since 2012 and sub-3:30 marathoner. Founded CorrerJuntos with a simple idea: no runner should have to train alone.