Marathon nutrition week before
A practical seven-day fueling plan for the final week, with portions in grams and US household measures.
Written by Victura Nutrition TeamReviewed by Victura Editorial ReviewLast updated Nov 5, 2026
Quick answer
Build meals around familiar, low-fiber carbohydrates such as white rice, pasta, potatoes, oats, bread, bananas, and honey. Keep protein moderate with chicken, fish, eggs, yogurt, or tofu. Early in the week, eat balanced meals; in the final 2-3 days, increase carbohydrate portions and reduce very high-fiber foods if they bother your gut.
A practical seven-day fueling plan for the final week, with portions in grams and US household measures.
Key takeaways
- Keep training light and raise carbohydrate intake gradually over the final seven days.
- Aim for familiar, low-fiber starches 2-3 days out and avoid new foods.
- Drink to thirst and include sodium if sweat losses are high.
- Practice race-morning breakfast before race week, not on race day.
Sports nutrition evidence for the final seven days
Research-backedRace week has one main job: top off glycogen
The final seven days before a marathon are not a time for crash dieting, new supplements, or dramatic weight changes. The main job is to keep training light, protect digestion, and gradually increase carbohydrate intake so muscle and liver glycogen are full on race morning. Sports nutrition position stands support high carbohydrate availability before endurance events, but the plan must fit your body weight, sweat losses, and gut tolerance.
Most runners do not need a strict 'carb load' for all seven days. A practical approach is normal balanced eating early in the week, then a focused carbohydrate increase 2-3 days out. This page uses US and Canadian household measures alongside grams so you can plan without a scale.
How many carbs to eat each day
Use body weight to set a range. A common starting point is about 5-7 g of carbohydrate per kg per day (2.3-3.2 g/lb) early in race week, rising to about 8-12 g/kg/day (3.6-5.4 g/lb) for the final 2-3 days when training is very light. Position stands commonly cite 10-12 g/kg/day for 36-48 hours to maximize glycogen stores, while many runners do well at the lower end of that range. For a 70 kg (154 lb) runner, 8 g/kg is about 560 g of carbohydrate per day, and 10-12 g/kg is roughly 700-840 g.
Choose mostly low-fiber, familiar starches and fruits rather than relying on candy and soda. Spread carbohydrate across 3 meals and 2-3 snacks. Keep protein steady at about 1.2-1.6 g/kg/day (0.5-0.7 g/lb/day) and keep fat moderate. If you are managing diabetes, kidney disease, or another medical condition, get individualized advice before making large changes.
Specific whole foods that work well in race week include the portions below. Treat the gram weights as approximate references and confirm exact values for your brands in USDA FoodData Central:
- Cooked white rice: 1 cup (180 g; 6.3 oz).
- Cooked pasta: 1 cup (140 g; 4.9 oz).
- Baked potato: 1 medium (173 g; 6.1 oz).
- Cooked oats: 1 cup (240 g; 8.5 oz).
- Bread: 2 slices (56 g; 2.0 oz).
- Banana: 1 medium (118 g; 4.2 oz).
- Raisins: 1/4 cup (43 g; 1.5 oz).
- Honey: 1 tbsp (21 g; 0.7 oz).
- Plain Greek yogurt: 1 cup (245 g; 8.6 oz).
- Chicken breast: 4 oz (113 g).
- Salmon: 4 oz (113 g).
- Eggs: 2 large (100 g; 3.5 oz).
For per-100g nutrient breakdowns of the carbohydrate staples above, see the Victura pages on banana nutrition, oats, white rice, and pasta, or browse the full Victura nutrition hub.
A seven-day fueling timeline
The table below is a flexible template, not a prescription. Keep portions familiar and adjust for body size, training load, and appetite. Every portion is shown in grams and US household units.
| When | What to eat | Portion (g + US units) | Why |
|---|---|---|---|
| Days 7-5 | Balanced meals with rice, eggs, vegetables, fruit | 1 cup (180 g; 6.3 oz) cooked rice + 2 large eggs (100 g; 3.5 oz) + 1 cup (150 g; 5.3 oz) cooked vegetables | Maintains normal fueling while training tapers |
| Days 4-3 | Add an extra starch snack | 1 medium banana (118 g; 4.2 oz) + 1 tbsp (21 g; 0.7 oz) honey + 1 cup (245 g; 8.6 oz) plain Greek yogurt | Increases carbohydrate without heavy fiber |
| Days 2-1 | High-carb, low-fiber meals | 2 cups (360 g; 12.7 oz) cooked white rice + 4 oz (113 g) chicken + 1 cup (150 g; 5.3 oz) cooked carrots | Tops off glycogen and limits gut residue |
| Night before | Familiar dinner, moderate portion | 1.5 cups (210 g; 7.4 oz) cooked pasta + 1/2 cup (120 g; 4.2 oz) tomato sauce + 3 oz (85 g) chicken | Provides carbohydrate and protein without new foods |
| Race morning, 3 h before | Oatmeal, banana, honey | 1 cup (240 g; 8.5 oz) cooked oatmeal + 1 medium banana (118 g; 4.2 oz) + 1 tbsp (21 g; 0.7 oz) honey | Familiar carbohydrate meal with time to digest |
| 60-90 min before | Small carbohydrate snack if tolerated | 1/2 medium banana (59 g; 2.1 oz) + 1/2 tbsp (10 g; 0.4 oz) honey | Tops off fuel without heaviness |
Bottom line: Start with normal meals, increase carbohydrate gradually, and make the final 24-36 hours low in fiber and high in familiar starches.
Protein, fat, and fiber in race week
Protein supports repair, but race week is not the time for very high protein intakes that crowd out carbohydrate. Keep protein portions moderate at meals, such as 3-4 oz (85-113 g) of chicken, fish, or tofu, or 1 cup (245 g; 8.6 oz) of Greek yogurt. Fat is fine in normal amounts, but very high-fat meals close to a run can slow digestion and feel heavy.
Fiber is healthy in general, but many runners reduce high-fiber foods in the final 24-36 hours. That may mean choosing white rice over brown rice, plain pasta over whole-grain pasta, and cooked vegetables over large raw salads. Do not cut fiber for the whole week unless a clinician or sports dietitian advises it. Keep vegetables at meals early in the week and adjust only if you know fiber causes gut problems during hard efforts.
Hydration and electrolytes
Start race week well hydrated but do not force fluids. A practical target is about 2-3 L (68-100 fl oz) of total fluid daily from drinks and foods, adjusted for heat, body size, and sweat losses. Pale yellow urine is a useful simple check. In hot conditions or if you sweat heavily and leave white salt marks, include sodium in meals and fluids.
Avoid overdrinking plain water to the point of bloating or weight gain. Excessive fluid without sodium can dilute blood sodium in endurance events, which is dangerous. Salt tablets are not automatically needed; use them only with individualized advice. Practice your race-week fluids and electrolyte choices before the final days so race morning is not an experiment.
Troubleshooting and race-morning bridge
If appetite drops late in the week, use smaller meals and carbohydrate drinks, smoothies, or low-fiber snacks. If you feel sluggish after increasing carbs, check that you are not also eating very large high-fat meals. If you get diarrhea or cramps, return to simpler foods you tolerate and reduce fiber, sugar alcohols, and large raw portions.
Race morning should repeat a breakfast you have tested. Eat about 3 hours before the start if possible, then use a small snack 60-90 minutes out only if you tolerate it. Keep caffeine familiar and modest. The goal is not a perfect menu; it is a calm, familiar routine that leaves you fueled and confident at the start line. If you want to see how your own race-week intake compares with these ranges, log a few days in the Victura app.
Community and practical insights for race week
Community insightWhat runners commonly adjust
In practice, most runners do not need a complicated race-week diet. They need repeatable meals, a shopping list, and a plan for the days when travel, work, or nerves disrupt appetite. Victura community meal-log patterns suggest that the runners who feel best are usually the ones who practice their race-week menu before the final week, not the ones who try a new 'perfect' plan at the last minute.
Common adjustments include eating more carbohydrate at breakfast and lunch, keeping dinner familiar, and adding a planned evening snack. Runners who train in the evening often move their largest carbohydrate meal to lunch so digestion is calmer at bedtime. Runners with early starts often prep overnight oats or rice cakes the night before.
Day-by-day habits that travel well
- Shop early for white rice, pasta, potatoes, oats, bread, bananas, honey, raisins, yogurt, eggs, chicken, and salmon.
- Pack a carbohydrate snack for commute bags, such as a banana (118 g; 4.2 oz) or raisins (43 g; 1.5 oz).
- Keep a water bottle visible and drink with meals rather than waiting until you feel very thirsty.
- Write a simple dinner plan for the final three nights so decisions are already made.
- Test race-morning breakfast at least once before race week.
Race-week troubleshooting
Nerves can reduce appetite, so use liquid carbohydrate or small frequent snacks if solid food feels heavy. If you are traveling, choose plain rice, bread, pasta, bananas, and broth-based soups rather than unfamiliar local dishes. Avoid alcohol in the final 24-48 hours because it can disrupt sleep and hydration, even if you tolerate it normally.
Do not use race week to start a new supplement, a new high-fiber plan, or a weight-loss diet. The priority is consistency. A simple checklist on the refrigerator can be more useful than a detailed spreadsheet. If you have a history of gastrointestinal problems, low blood sodium, diabetes, or kidney disease, work with a sports dietitian or physician rather than copying another runner's plan.
References
- Position of the Academy of Nutrition and Dietetics, Dietitians of Canada, and the American College of Sports Medicine: Nutrition and Athletic Performance(pubmed)
- Carbohydrates for training and competition(pubmed)
- Nutrition for endurance sports: marathon, triathlon, and road cycling(pubmed)
- USDA FoodData Central(usda)
- Dietary Supplements for Exercise and Athletic Performance(nih_ods)
- Victura anonymized meal-log patterns and editorial synthesis(victura)
Frequently asked questions
People also ask
What should I eat the week before a marathon?
Build meals around familiar, low-fiber carbohydrates such as white rice, pasta, potatoes, oats, bread, bananas, and honey. Keep protein moderate with chicken, fish, eggs, yogurt, or tofu. Early in the week, eat balanced meals; in the final 2-3 days, increase carbohydrate portions and reduce very high-fiber foods if they bother your gut.
How many carbs should I eat 7 days before a marathon?
Seven days out, many runners start around 5-7 g/kg/day (2.3-3.2 g/lb/day) and raise intake to about 8-12 g/kg/day (3.6-5.4 g/lb/day) for the final 2-3 days, with 10-12 g/kg/day for 36-48 hours commonly cited to maximize glycogen. A 70 kg (154 lb) runner would target roughly 350-490 g/day early, about 560 g/day at 8 g/kg, and roughly 700-840 g/day at 10-12 g/kg. Individual needs vary with training load and medical history.
Should I carb load the whole week before a marathon?
Not usually. A full seven-day strict carb load is unnecessary for most runners and can feel uncomfortable. A better plan is normal balanced eating for the first few days, then a focused carbohydrate increase 2-3 days before the race, which is the window where glycogen loading has the most evidence. Keep training light during that final increase.
What foods should I avoid the week before a marathon?
Avoid new foods, very spicy or fried meals close to runs, excess alcohol, and large high-fiber portions in the final 24-36 hours if you are sensitive. Also skip new supplements, sugar alcohols, and heavy creamy sauces before hard efforts. Keep caffeine familiar and modest.
How much water should I drink the week before a marathon?
Aim for about 2-3 L (68-100 fl oz) of total fluid daily from drinks and foods, adjusted for heat, sweat, and body size. Pale yellow urine is a reasonable check. Do not force large amounts of plain water; include sodium from meals and fluids if you sweat heavily.
Does carb loading actually improve marathon performance?
High carbohydrate availability before endurance exercise can improve performance and delay fatigue, especially for events lasting longer than about 90 minutes. The benefit depends on starting glycogen, race pace, heat, and gut tolerance. It is not a guarantee, and more carbohydrate is not always better if it causes stomach distress.
When should I start carb loading before a marathon?
Most runners can start a focused increase about 2-3 days before the race, with the highest intake in the final 24-36 hours. If you have tested a longer load, you can begin earlier. Keep portions based on body weight and reduce fiber as needed.
Should I stop fiber the week before a marathon?
No, not for the whole week unless a clinician or sports dietitian advises it. Many runners reduce high-fiber foods only in the final 24-36 hours. Choose cooked vegetables and white starches if raw salads, beans, or bran cause gas or urgency during runs.
Can I drink coffee during race week?
Keep caffeine familiar and modest. If you normally drink coffee, race week is not the time to stop suddenly or to double your usual amount. Test your race-morning coffee timing before race day so you know how your gut responds.
What if I have diabetes or kidney disease?
Get individualized advice from your physician or a sports dietitian before making large carbohydrate or fluid changes. Race-week fueling can affect blood glucose, potassium, sodium, and fluid balance. Do not copy a general marathon plan if you manage a medical condition.
How many grams of carbs per day should I eat the week before a marathon?
Early in race week, many runners aim for about 5-7 g of carbohydrate per kg of body weight per day (2.3-3.2 g/lb), rising to about 8-12 g/kg/day (3.6-5.4 g/lb) for the final 2-3 days. A 70 kg (154 lb) runner would target roughly 350-490 g/day early and about 560-840 g/day in the final days, depending on training load and tolerance.
What is a simple marathon carb loading meal plan for the last 3 days?
Build meals around low-fiber starches such as white rice, pasta, potatoes, oats, and bread, with moderate protein like chicken, fish, eggs, or yogurt. For example, 2 cups (360 g) cooked white rice with 4 oz (113 g) chicken and cooked carrots, plus snacks like a banana (118 g) with honey (21 g). Keep foods familiar and spread carbohydrate across 3 meals and 2-3 snacks.
How we review this guide
- Written by
- Victura Nutrition Team
- Reviewed by
- Victura Editorial Review
- Reference sources
- 8
- Last updated
- Nov 5, 2026
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