Mavr Sports Nutrition Team
Updated October 2, 2026. 9 min read.
What to eat before a 10K, in short: a normal dinner with a bit more rice, pasta, or potatoes the night before, then a familiar, low-fiber breakfast with 1 to 1.5 g of carbs per kg of body weight about 2 to 3 hours before the start. Toast with jam, a banana, and a glass of juice is a classic. A small snack 15 to 30 minutes before is optional. During the race, most runners need only water.
That is the whole plan. The rest of this guide gives you portions by body weight, what to do if you are short on time, and when a gel or caffeine is worth it.
Night before
What to eatNormal dinner with a carb base
NotesFamiliar foods, normal portion, not too much fat or fiber
2 to 3 hours before
What to eatBreakfast with 1 to 1.5 g carbs per kg
NotesToast or bagel, fruit, juice
15 to 30 minutes before
What to eatOptional: half a banana or a gel
NotesOnly if you tried it in training
During the race
What to eatWater, no gel needed for most
NotesSports drink sips if it is hot or you run over an hour
After (within 1 to 2 hours)
What to eatNormal meal with carbs and protein
NotesDrink to thirst, add salt if you sweated a lot
| When | What to eat | Notes |
|---|---|---|
| Night before | Normal dinner with a carb base | Familiar foods, normal portion, not too much fat or fiber |
| 2 to 3 hours before | Breakfast with 1 to 1.5 g carbs per kg | Toast or bagel, fruit, juice |
| 15 to 30 minutes before | Optional: half a banana or a gel | Only if you tried it in training |
| During the race | Water, no gel needed for most | Sports drink sips if it is hot or you run over an hour |
| After (within 1 to 2 hours) | Normal meal with carbs and protein | Drink to thirst, add salt if you sweated a lot |
You do not need to carb-load for a 10K. Carb loading (about 10 to 12 g of carbs per kg per day for 36 to 48 hours) is meant for races longer than about 90 minutes. A 10K takes most runners 30 to 75 minutes, and normal glycogen stores cover that.
What the night before is really for: a meal that tops up your stores without upsetting your stomach the next morning. Eat a normal-sized plate with a clear carb base, some protein, and not much fat, fiber, or spice.
This is the most important food decision of your 10K. Sports nutrition guidelines suggest 1 to 4 g of carbs per kg in the 1 to 4 hours before exercise. For a 10K, the lower end is plenty: about 1 to 1.5 g per kg, 2 to 3 hours before the start. Keep it familiar, low in fat and fiber, and easy to digest.
55 kg
Breakfast carbs (1 to 1.5 g/kg)55 to 85 g
ExampleBagel with honey and a banana
65 kg
Breakfast carbs (1 to 1.5 g/kg)65 to 100 g
Example2 slices of toast with jam, banana, small juice
75 kg
Breakfast carbs (1 to 1.5 g/kg)75 to 115 g
ExampleOatmeal with honey and banana, plus toast
85 kg
Breakfast carbs (1 to 1.5 g/kg)85 to 130 g
ExampleBagel with jam, banana, and a glass of juice
| Body weight | Breakfast carbs (1 to 1.5 g/kg) | Example |
|---|---|---|
| 55 kg | 55 to 85 g | Bagel with honey and a banana |
| 65 kg | 65 to 100 g | 2 slices of toast with jam, banana, small juice |
| 75 kg | 75 to 115 g | Oatmeal with honey and banana, plus toast |
| 85 kg | 85 to 130 g | Bagel with jam, banana, and a glass of juice |
Simple breakfast ideas, each about 65 to 75 g of carbs:
Add a coffee or tea if that is your normal routine, and drink a glass or two of water with breakfast. If you want a number, fluid guidelines suggest about 5 to 7 ml per kg of body weight at least 4 hours before exercise, which is about 350 to 500 ml for a 70 kg runner.
2 to 3 hours
Full breakfast (see above)
Carbs1 to 1.5 g/kg
About 1 hour
Banana, or toast with honey
Carbs25 to 40 g
15 to 30 minutes
Half a banana, a gel, or a few sips of sports drink
Carbs15 to 25 g
Under 15 minutes
Water only, or nothing new
CarbsNone needed
| Time before the start | What to eat | Carbs |
|---|---|---|
| 2 to 3 hours | Full breakfast (see above) | 1 to 1.5 g/kg |
| About 1 hour | Banana, or toast with honey | 25 to 40 g |
| 15 to 30 minutes | Half a banana, a gel, or a few sips of sports drink | 15 to 25 g |
| Under 15 minutes | Water only, or nothing new | None needed |
Less is better than too much close to the start. A heavy breakfast 45 minutes before a hard 10K is a common cause of stitches and nausea.
For most runners, no. Research on efforts of about 45 to 75 minutes shows only small benefits from carbs, and even a mouth rinse or a few sips of sports drink can give most of that effect. You will not run out of glycogen in a 10K if you ate a normal diet and a decent breakfast.
A gel 10 to 15 minutes before the start is fine if you already do this in training. If not, race day is not the time to start.
Cool (under 15°C / 60°F)
A few sips of water at an aid station if you want. You will not dehydrate in 30 to 50 minutes.
Warm (over 20°C / 70°F)
Take water at each aid station. A sip of sports drink is fine.
Hot or humid (over 25°C / 80°F)
Start well hydrated, take water at every station, and pour some over your head. Slow your pace.
| Weather | What to do |
|---|---|
| Cool (under 15°C / 60°F) | A few sips of water at an aid station if you want. You will not dehydrate in 30 to 50 minutes. |
| Warm (over 20°C / 70°F) | Take water at each aid station. A sip of sports drink is fine. |
| Hot or humid (over 25°C / 80°F) | Start well hydrated, take water at every station, and pour some over your head. Slow your pace. |
Do not force fluid. Drinking more than you sweat can lower blood sodium, which is dangerous. In a 10K this is rare, but it happens to runners who drink large amounts before and during short races.
Caffeine is one of the few supplements with strong evidence for endurance performance. The researched range is about 3 to 6 mg per kg of body weight, taken about 60 minutes before. Most runners do well near the low end: 3 mg per kg is about 200 mg for a 70 kg runner. Use it only if you already drink coffee and have tried it before hard runs. If coffee makes you jittery or sends you to the toilet, skip it.
Eat a normal breakfast, then make lunch your main carb meal about 3 to 4 hours before the start. Have a light snack such as a banana or toast with honey 60 to 90 minutes before. Avoid a full meal in the last 2 hours.
A 10K does not empty your glycogen the way a marathon does, but you still worked hard. If you train again within a day or two, recovery food helps.
Mavr sets your pre-race meal timing and race-day carb targets from your goal time, for 5K through marathon. For a race this short, the plan is simple enough to set yourself: a tested breakfast 2 to 3 hours out, water during, and save the gels for longer days.
A familiar, low-fiber breakfast with 1 to 1.5 g of carbs per kg of body weight, 2 to 3 hours before the start. Toast with jam, a banana, and juice, or oatmeal with honey, both work well. Add an optional small snack 15 to 30 minutes before.
A normal dinner with a clear carb base, such as pasta, rice, or potatoes, some protein, and not much fat, fiber, or spice. Eat a normal portion. You do not need to carb-load.
No. Carb loading is for races longer than about 90 minutes. Eat normally in the days before and have a carb-focused breakfast on race morning.
Most runners do not need one. If your 10K takes over about 75 minutes, one gel or some sports drink around halfway can help, but only if you tried it in training.
Make lunch your main carb meal 3 to 4 hours before the start, then have a light snack 60 to 90 minutes before. Avoid a full meal in the last 2 hours.
If you drink coffee often, yes. About 3 mg of caffeine per kg, roughly 60 minutes before, is a common dose. If you do not usually drink coffee, race morning is not the time to start.
General guidance for healthy adults, not medical advice. Talk to a doctor or registered dietitian if you have a health condition, take medicines or have special dietary needs. Caffeine advice is for healthy adults only. EFSA's safe limit is 200 mg in one dose and 400 mg in a day.
Mavr sets your pre-race meal timing and race carb targets from your goal time, for 5K through marathon.
Ask Kai, the coach in the app