Mark had trained for 18 weeks. Long runs done. Speed sessions ticked off. He felt good, right up until race week, when the nerves kicked in and he convinced himself one more 16 km run on Thursday would sharpen him up.
It didn’t. He crossed the start line of his half marathon with heavy legs, a tight right calf, and the quiet suspicion that he’d done something wrong. He had, but it wasn’t anything in the 18 weeks of training. It was the seven days he mismanaged at the end.
Race week is where months of hard work either get delivered or quietly undermined. The good news: done right, it’s the easiest performance gain in running. You’re not adding fitness at this point, your body just needs the space to express what it already has.
Here’s how to give it that space, day by day.
Why Taper Week Feels Wrong, and Why You Should Trust It Anyway
The week before a race is built around a concept called tapering: deliberately reducing training volume so that accumulated fatigue drains away, leaving your fitness intact and your legs ready to fire.
Research published in Medicine and Science in Sports and Exercise found that a well-executed taper improves race performance by an average of 2-3%. For a runner targeting two hours in a half marathon, that’s a free two to three minutes, without running a single extra kilometre.
The catch is that tapering feels terrible. Reducing mileage often triggers what coaches call “taper madness”: phantom aches, low energy, restlessness, and the overwhelming sense that you’re getting slower. You’re not. The fatigue is lifting, and your body is doing exactly what it’s supposed to do.
The key variables are straightforward. Research consistently supports reducing weekly volume by 40-60% in the final week while keeping some intensity, short bursts at race pace, to maintain neuromuscular sharpness. What you’re not doing is adding anything new: no new routes, no new shoes, no heroic last-minute sessions.
Your Day-by-Day Race Week Plan
This plan is written for a Sunday race. Adjust the days to fit your race day. The principles stay the same whether you’re running a 5K or a full marathon, though carbohydrate loading (noted on Days 3-2) is most relevant for half marathon distance and above.
Day 7, Seven Days Out: Last Quality Run
This is your final run with any real purpose behind it. Keep it familiar: a route you know, shoes you’ve been training in, and an effort you’ve done before. For most runners, this means an easy to moderate 45-60 minutes, possibly with a short tempo segment or a few strides at the end if your plan calls for it.
What it is not: a panic run. Don’t add distance to compensate for a week you felt was light. The fitness bank is closed. You’re spending what’s already in it.
Check: Is your kit washed and ready to inspect later in the week? Start the mental list now.
Day 6, Six Days Out: Easy Shakeout or Full Rest
Drop the effort significantly. If you run, keep it to 20-30 minutes at a genuinely easy pace, conversational, relaxed, nothing to prove. If your legs feel heavy or your schedule is tight, take the rest day without guilt.
Begin drinking deliberately today. Not dramatically, just making sure you’re not going into race week in a subtle deficit. Water with meals, a glass mid-morning, and monitor the colour of your urine as a simple guide. Pale yellow is the target.
Day 5, Five Days Out: Race-Pace Strides and Logistics
A short run of 25-40 minutes, with four to six strides at race pace woven in. These keep your legs accustomed to the effort without accumulating fatigue. Each stride should last 20-30 seconds, enough to feel sharp, not enough to tax your system.
After your run, sit down and confirm your race logistics:
- What time does bib collection open?
- How long is the journey to the start?
- Where are you parking or catching transport?
- What does the course profile look like?
Sorting this on Day 5 means you’re not Googling it at 10pm on Saturday night.
Day 4, Four Days Out: Rest, Sleep, and Nothing Clever
Full rest or a very light cross-training session (gentle cycling or swimming, nothing that loads the legs). The focus today is sleep.
Athletic performance research consistently links sleep quality in the days before an event to race-day outcomes. You can’t bank sleep in advance, but you can stop eroding it. Keep screens out of the bedroom, go to bed at a consistent time, and treat this night as part of your preparation rather than an afterthought.
This is also a good day to confirm your pre-race meal plan, not to change it, but to make sure you have the ingredients at home and won’t be improvising on Saturday evening.
Day 3, Three Days Out: Kit Check and an Easy Run
An easy 20-25 minutes, legs only, breathing easy. This is a maintenance run, not a workout.
After you’re back and showered, lay out your full race kit:
- Race bib
- Safety pins
- Running shoes (your race shoes, not your trainers)
- Socks
- Shorts and top
- GPS watch, fully charged
- Headphones if you use them
- Any nutrition you’ll carry (gels, chews)
- Post-race layer
Check everything. Replace anything that looks worn or unreliable now, not tomorrow.
If you’re running a half marathon or marathon, begin increasing carbohydrate intake from today, pasta, rice, potatoes, bread. The goal is to top up your glycogen stores. Research suggests this can increase stored glycogen by 10-20%, which translates directly into sustained energy availability during the race. Keep portion sizes sensible; you’re not eating twice as much, just shifting the balance of your plate toward carbohydrates.
Day 2, Two Days Out (Saturday for a Sunday Race): Short Jog or Full Rest
If you run, make it 10-15 minutes, just enough to loosen the legs and confirm the shoes feel right. Some runners do better with this shakeout; others feel better on complete rest. Know which type you are.
Your carbohydrate focus continues today. Dinner tonight is the meal most runners overthink. Keep it simple: a familiar dish with a good carbohydrate base, low in fibre (to avoid digestive issues on race morning), and nothing you haven’t eaten before. Pasta with a light sauce, rice and chicken, a jacket potato, reliable and proven.
Read our full guide on what not to eat the night before a race.
Alcohol: none. Even a single drink disrupts sleep quality and impairs glycogen storage. It’s one night.
Set two alarms for race morning and get to bed early, even if you don’t fall asleep quickly. Rest with your eyes closed still counts.
Day 1, Race Morning: Fuel, Warm Up, Go
2-3 hours before the gun: Eat your pre-race meal. For most runners, this is something carbohydrate-based and familiar, porridge, toast with nut butter, a bagel. Around 400-600 calories is a reasonable guide. Eat enough to feel fuelled, not so much that you feel heavy.
60-90 minutes out: Start sipping water steadily. If you’re racing for longer than 75-90 minutes, consider having a gel or small snack in the final 30 minutes before the start.
30 minutes before the start: Begin your warm-up. For a 5K or 10K, this should include 10 minutes of easy jogging followed by dynamic drills and a few race-pace strides. For a half marathon or marathon, a shorter jog and some dynamic stretching is sufficient, you’ll warm up in the first kilometre of the race itself.
Then trust your training. It’s already done.
Predict Your Finish Time Before Race Morning
Before the end of this week, lock in a realistic target time based on your recent training. Going into a race without a clear goal leads to starting too fast, the most common cause of a second-half blow-up.
Predict your finish time with the RunReps race time predictor.
Once you have a target time, calculate the exact pace per kilometre (or mile) you need to hold.
Calculate your target race pace.
Write both numbers down. Know them before Saturday evening.
Fuelling the Final Days: What to Focus On (and What to Avoid)
For runs under 75 minutes, the carbohydrate loading guidance above is less critical, your existing glycogen stores are likely sufficient. Focus instead on eating normally, staying hydrated, and avoiding anything that might cause digestive disruption.
For half marathon and marathon runners, the priority is:
Increase carbohydrates, reduce fat and fibre. Fat and fibre slow digestion and can sit heavily in the gut. In the final two days, shift your plate toward rice, pasta, white bread, and easily digestible sources rather than wholegrain, high-fibre alternatives.
Avoid new foods entirely. Race week is not the time to try the new Thai restaurant, eat unfamiliar protein bars, or experiment with a recipe you’ve never made. Your digestive system needs predictability.
Keep protein moderate, not high. You don’t need to load protein this week. A normal intake is fine, roughly 1.4-1.7 g per kg of bodyweight across the week, if you want a number to work with. See the RunReps protein intake calculator for personalised guidance.
Caffeine: If you normally drink coffee, keep your routine the same. Cutting caffeine cold turkey in race week causes headaches and fatigue. If you plan to use caffeine as a performance aid during the race, a 3-4 day reduction before race day can restore sensitivity, but only attempt this if you have enough time to feel normal again before the gun.
Handling the Mental Side of Taper Week
Taper madness is real, well-documented, and almost universal among experienced runners. Symptoms include: feeling inexplicably tired, noticing aches you’d never normally register, doubting your fitness, and a powerful urge to run more.
Recognise it for what it is, a psychological response to reduced load, not evidence that something has gone wrong. Your body is restoring itself. The fatigue you accumulated over months of training is finally being given space to clear.
A few things that help: keep your routine as normal as possible; don’t fill the extra time with anxious researching of race-day weather or obsessive checking of competitors’ recent activity. Revisit a training session you’re proud of, look back at a strong long run, a good tempo, a session where you surprised yourself. Your fitness is in there. And prepare the things you can control: kit check, logistics, race-day plan. Action beats anxiety.
If you find yourself questioning your goal pace, revisit your training data. A well-structured plan leaves a clear evidence trail. You don’t need to feel sharp on Thursday, you need to feel sharp on Sunday.
Your Race Week at a Glance
- Day 7: Last meaningful run, familiar effort, familiar route, no extras
- Day 6: Easy shakeout or rest; begin deliberate hydration
- Day 5: Short run with race-pace strides; confirm race logistics
- Day 4: Rest and prioritise sleep; confirm your pre-race meal plan
- Day 3: Easy run; full kit check; begin carbohydrate focus (half/full marathon)
- Day 2: Optional short jog; familiar carb-based dinner; no alcohol; early night
- Race morning: Pre-race meal 2-3 hrs out; dynamic warm-up; trust the training
Frequently Asked Questions
Should I run the day before a race?
For most runners, a short 10-15 minute jog the day before helps loosen the legs without adding any fatigue. It also gives you a final chance to confirm your shoes feel right. However, if you know from experience that rest serves you better, or if your legs are feeling tight, taking the day completely off is equally valid. This is one area where personal preference matters more than a universal rule.
How much should I reduce mileage in race week?
Research supports reducing weekly volume by 40-60% compared to your recent peak weeks, while keeping some intensity through short race-pace efforts. So if your peak week was 60 km, a race week of 25-35 km, with most of it at easy effort, is appropriate. The exact number matters less than the principle: do less, recover more, keep a little sharpness.
Is it normal to feel tired and sluggish during taper week?
Yes, and it’s one of the more counterintuitive aspects of marathon and half marathon training. The reduction in volume removes the stimulus your body has adapted to, and the result can feel like fatigue or flatness. This is temporary. Most runners report feeling significantly better by race morning. Trust the process.
What should I eat the night before a race?
Stick to a familiar, carbohydrate-based meal that’s low in fat and fibre, pasta with a simple sauce, rice and chicken, or a jacket potato are all reliable choices. Eat it early enough that you’re not still digesting when you go to bed, and avoid anything you haven’t eaten before. For a full breakdown of what to avoid, see our guide to what not to eat the night before a race.
Does a negative split strategy require a different race week plan?
Your race week preparation stays the same regardless of pacing strategy. What changes is the number you write down on Saturday evening. If you’re planning to run negative splits, running the second half faster than the first, use the RunReps negative split calculator to work out your target paces for each half, and commit to them before race morning.
All training load and nutrition guidance in this article is general in nature. If you are returning from injury or managing a medical condition, consult a qualified professional before following a race week plan.
