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What should I eat & drink during a marathon?

Drinking water bottle during running

How important is nutrition while running?

Running a marathon requires a lot from your body. Obviously, you need to be physically fit to run those 42.195 km, but besides that, your nutrition is also an important part.
While a healthy & balanced diet is the basis for any athlete and in itself sufficient for shorter distances, an effort like a marathon requires just a bit more.


How much should I eat & drink during a marathon?

Your marathon nutrition plan actually starts a few days before race day.It is important, on the one hand, to store the necessary energy by focusing on carbohydrates (so-called 'carb stacking' or 'carb loading') and, on the other hand, to limit the intake of fibre, fats & proteins to avoid gastrointestinal problems.

Of course, everything also depends on your ambition at the marathon: do you have no specific target time in mind and just want to cross the finish line or do you want to attack your PR? Your target time will ultimately determine how much nutrition you take in.

As a rule of thumb, we recommend taking in at least 60g of carbohydrates per hour. This will allow you to keep going longer and avoid bonking (or at least postpone this as much as possible).

2 very important tips on this:

  • Experiment during training sessions to let your stomach adjust to this ('gut training'). Trying out new things on race day is definitely not a good idea!

  • Don't wait until you get hungry or thirsty, start eating & drinking right from the start.


Wat eten voor de wedstrijd?

Je voedingsplan voor de marathon begint eigenlijk al enkele dagen voor wedstrijddag.
Zo is het belangrijk om enerzijds de nodige energie op te slaan door te focussen op koolhydraten (het zogenaamde 'koolhydraten stapelen' of 'carb loading') en anderzijds de inname van vezels, vetten & eiwitten te beperken om maag- en darmklachten te vermijden.

Het ontbijt op wedstrijddag neem je best min. 3u voor de start. Denk ook hierbij weer aan de nodige koolhydraten, richt hierbij op 1 tot 4 gram koolhydraten per kg lichaamsgewicht. Typische voorbeelden zijn pannenkoeken, wit brood met confituur of ander zoet beleg, ... Deze vaste voeding kan je gerust ook aanvullen met bv. Carboloader.

Een halfuurtje voor aanvang kan je ook nog wat isotone drank of een energy gel/fruit innemen om je klaar te stomen voor de start.

Zorg ten slotte ook dat je voldoende gehydrateerd aan de startlijn komt.

Optioneel zijn shots zoals Guaranol of Nitro Fuel; deze hebben een actieve werking van zo'n 2-3 uur en zorgen voor een extra boost en verhoogde focus.
Je kan er ook voor kiezen om deze wat later tijdens de wedstrijd in te nemen, afhankelijk van je verwachte eindtijd.

What type of food should I eat?

There are several options for carbohydrate intake during running, within the SANAS range we recommend the following:

  • Isomix: this is an isotonic sports drink and therefore provides, on the one hand, fluid and carbohydrate absorption at the same time.
    Contains 30 g of carbohydrates per bottle

  • Energy gel: the fastest way to absorb carbohydrates.
    Contains 30 g of carbohydrates per gel

  • Energy fruit: if you're not a fan of gels, this is an ideal alternative to absorb carbohydrates (almost as) quickly.
    Contains 26 g of carbohydrates per fruit

  • Alphamax: this is a hypertonic sports drink and ideal if you prefer to drink only (because of speed, don't like to eat, or whatever reason) while running.
    Contains 90 g of KH per bottle. As Alphamax can have a dehydrating effect, one bidon of plain water should also be drunk per bidon of Alphamax.

Of course, you don't have to opt for the same food source throughout the race. Because of the 2:1 ratio of the above products, you can feel free to combine them with each other.

In theory, an energy bar is also possible, but we do not recommend it as much during a run as it is considered less practical by runners anyway. In addition, the energy from a bar is not released as quickly as the above products.

So apart from Alphamax, each of the above products contains +- 30g of carbohydrates. This makes it easy to draw up your marathon nutrition plan. You're welcome ;-)​​​​​​​

What after the race?

Running a marathon takes a huge toll on your body, so also provide a post-marathon section in your nutrition plan.

Essential in this is Carbomix, which contains the necessary proteins & carbohydrates to aid recovery.
It is also important to keep replenishing your fluid levels after the race.

Marathon Essentials


Flavors: Neutral

Packaging: Jar | Portion Bag

Content: 700 Gram | 100 Gram

4,00 € - 24,50 €
(Including 6.0 % VAT)


Flavors: Jackfruit

Packaging: Jar | Portion Bag

Content: 700 Gram | 70 Gram

2,74 € - 19,50 €
(Including 6.0 % VAT)


Flavors: Vanille | Chocolate | Strawberry | Banana

Packaging: Jar | Refill Bag | Portion Bag

Content: 1125 Gram | 3000 Gram | 75 Gram

2,75 € - 97,51 €
(Including 6.0 % VAT)

Energy Fruit

Flavors: Orange | Pineapple

Packaging: Box

Content: 18 Bars

30,00 €
(Including 6.0 % VAT)

Energy Gel

Flavors: Red Fruits | Orange | Piña Colada | Pomegranate | Tutti Frutti | Cola + Caffeine

Packaging: Box

Content: 12 Gels

28,50 € - 29,50 €
(Including 6.0 % VAT)


Flavors: Mint | Citrus

Packaging: Box

Content: 30 Ampoules

50,00 €
(Including 6.0 % VAT)


Flavors: Lemon | Orange | Pitaya | Iced Tea Peach | Red Fruits

Packaging: Jar | Refill Bag | Portion Bag

Content: 735 Gram | 3000 Gram | 35 Gram

2,00 € - 74,99 €
(Including 6.0 % VAT)

Nitro Fuel

Flavors: Pineapple

Packaging: Box

Content: 15 Bottles

55,00 €
(Including 6.0 % VAT)