How to adapt your diet to this unique endurance sport?
Swimrun, nutrition, and performance are closely linked. Between trail portions, open water swimming sections, temperature changes, and prolonged efforts, swimrun imposes very specific physiological constraints. Unlike a trail or a triathlon, it is impossible to rely on transitions to eat comfortably or reorganize your gear. Everything you need must be carried with you from start to finish, and that, believe it or not, changes the game!
Also, defining an appropriate dietary strategy allows you not only to maintain your energy level but also to limit digestive issues, fatigue hits, and costly refueling mistakes on the big day. The Baouw team, experts in sports nutrition, therefore unveils in this article the secrets of an effective strategy before, during, and after a swimrun, so that you only enjoy playing outside!
Does nutrition in swimrun differ from other endurance sports?
The swimrun alternates several sequences of running and open water swimming, often for several hours. This succession of efforts leads to high energy expenditures, especially when the water is cold or the course has significant elevation changes.
This sport is distinguished by various characteristics:
transitions are frequent,
the equipment is worn throughout the event,
access to food is sometimes limited,
temperature variations increase energy needs,
hydration is often more difficult to monitor than in traditional running.
The main nutritional objective is therefore to maintain a regular energy intake without disrupting digestion.
Nutrition before a swimrun: goal “build your energy reserves”
As with any endurance discipline, preparation begins before the start. The goal is not to eat more, but to gradually fill the muscle and liver glycogen stores that will serve as fuel during the effort.
Do you want to know more about the topic? Go read our article “optimize your energy reserve” !
Complex carbohydrates play a central role here: sweet potato, rice, quinoa, legumes, or even oats help to build an interesting energy stock.
The day before the race, prioritize meals that are:
rich in quality carbohydrates,
moderate in fiber,
easy to digest,
accompanied by regular hydration.
Products
On the morning of the event, a breakfast consumed about three hours before the start allows for replenishing reserves without digestive overload. A sweet potato puree, some nuts, and a hot drink make a good starting point.
The micronutrients useful for the swimrunner
Carbohydrates are just one element of the equation. Indeed, vitamins, minerals, and antioxidant compounds also contribute to recovery and adaptation to training. You can therefore treat yourself by incorporating red fruits, colorful vegetables, aromatic herbs, nuts, or quality vegetable oils into your meals, which will naturally provide you with polyphenols, vitamins C and E, zinc, and selenium. These nutrients help limit the effects of oxidative stress induced by prolonged efforts.
During the race: focus on maintaining energy… without digestive discomfort
How much carbohydrates to consume?
For formats exceeding one hour of effort, the generally observed recommendations in endurance sports range from 30 to 60 grams of carbohydrates per hour. Some experienced athletes go higher on long distances, provided they have trained their digestive system beforehand. It is important to emphasize that consistency is key: waiting for the first signs of fatigue to eat often leads to a drop in performance a few kilometers later.
Which foods to prioritize?
Products
In swimrun, practicality is king! Between energy gels, purees, or even energy bars, the options are numerous to encourage you to bring what you need to refuel intelligently.
At Baouw, our products are designed for endurance athletes. In other words, they are easy to chew and are rich in natural ingredients, better tolerated during prolonged efforts like in swimrun. And for even more practicality, our mix of energy sticks offers you the ideal format to slip into the pocket of your wetsuit without cluttering you, weighing you down, or hindering your movements.
The famous test of strategy in training
We can never say it enough: the best nutritional strategy is the one you have already validated before the competition! Every athlete has their own digestive tolerance. It is therefore preferable to replicate the race conditions in training to determine:
the amount of carbohydrates that can be absorbed,
your ideal refueling frequency,
the flavors that are best tolerated (yes, it matters),
the volume of water needed.
This approach fits perfectly into the logic of marginal gains : small repeated adjustments can make a noticeable difference in final performance.
What about hydration in swimrun?
We explained to you in our article “hydration and swimming” that regular contact with water can give the impression of sweating less. However, fluid losses are still very present, and even mild dehydration can lead to a decrease in performance, an increase in fatigue, an alteration of thermoregulation, and an increased risk of cramps. Depending on weather conditions, the duration of the event, and your athlete profile, water needs vary.
Ideally, it is relevant to combine water, sodium, and possible carbohydrates, as our energy drinks specially designed for effort suggest. Let’s remember that it is better to drink regularly in small amounts rather than waiting for a strong feeling of thirst.
What to eat after a swimrun to optimize recovery?
Recovery starts… from the first minutes after crossing the finish line! The goal is twofold:
to replenish glycogen stores.
to promote muscle repair.
A snack combining carbohydrates and proteins is generally recommended after effort. This can translate into a well-composed plate (sorry for the pasta party!) or a recovery drink like our protein drinks. Right after the finish, you can also enhance your water with an electrolyte tablet to compensate for losses related to sweating. The key point: a well-managed recovery facilitates the succession of training sessions and contributes to your long-term progress.
The most common mistakes related to swimrunner nutrition
Even among experienced athletes, certain mistakes regularly recur, including:
to start with an untested food strategy,
to underestimate hydration needs,
to wait for the feeling of hunger to eat,
to consume too many products high in quick sugars at once,
to neglect recovery after the event.
Swimrun rewards consistency more than 'one shot' actions. A simple, tested strategy tailored to your needs will always be more effective than a complicated plan that is impossible to implement on race day.
In swimrun, aim for a nutrition designed for endurance!
Far from being trivial, the discipline requires well-defined nutrition. It starts several days before the event, builds during training, and continues until recovery. By prioritizing quality foods, learning to manage your energy reserves, taking care of your hydration, and regularly testing your nutrition, you put all the chances on your side to remain performant, from the first dive to the last kilometer, without any issues on the horizon!
Products