We talk a lot about the mind, motivation, self-confidence, and stress management. But the brain is part of the body: it cannot function at its best if the body is deficient or simply lacks what it needs.
In fifteen years of working with athletes, I have often seen people try to improve mental performance without always looking at what is on the plate.
To keep it simple, I recommend including four essential building blocks in your diet.
🧱 The 4 building blocks of performance
🍞 1. Carbohydrates: fuel
They provide the energy needed for physical effort, as well as for brain function and concentration.
Bread, rice, pasta, potatoes, oats, quinoa, fruit…
In general, choose quality carbohydrates: whole-grain, semi-whole-grain, or multigrain bread; oats; rice; potatoes; sweet potatoes; quinoa; legumes… The idea is to favor minimally processed foods and limit very sugary or ultra-processed products.
The amount should then be adapted to your activity level: the more demanding the effort, the greater the need for fuel.
🍳 2. Protein: repair and strengthen
Protein contributes to muscle building, recovery, and the body’s maintenance.
Eggs, fish, meat, dairy products, legumes…
For an athlete, the idea is simple: include protein regularly throughout the day, without necessarily trying to eat huge amounts at every meal.
🥑 3. Fats: lasting energy
Fats are not the enemy of performance. They are especially important for the functioning of the brain, cells, and hormonal system.
Olive, rapeseed, or walnut oil; avocado; almonds; walnuts; sardines…
We need fats. Above all, we need good fats.
🥦 4. Fruits & vegetables: protect and balance
Vitamins, minerals, antioxidants, and fiber: they contribute to the proper functioning of the body, recovery, and physical and mental readiness.
An easy rule to remember: vary your fruits, vegetables, and colors.
🎯 The 4 building blocks throughout the day
Needs vary depending on age, sport, body type, training, and goals. These proportions are therefore simple, visual guidelines—not amounts that need to be weighed.
🟨 Carbohydrates 🟥 Protein 🟦 Fats 🟩 Fruits & vegetables
🌅 BREAKFAST — Refuel
🟨 🟨 🟨 🟨 🟥 🟥 🟥 🟩 🟩 🟦
Whole-grain, semi-whole-grain, or multigrain bread, or oats • eggs or a dairy product • fruit • a few walnuts or almonds
Mental goal: energy + concentration
🕛 LUNCH — Energy, building, balance
🟨 🟨 🟨 🟥 🟥 🟥 🟩 🟩 🟩 🟦
Rice, pasta, or potatoes • meat, fish, eggs, or legumes • vegetables • quality oil
Mental goal: stability + alertness
🍌 SNACK — Refuel without overthinking it
🟨 🟨 🟨 🟥 🟥 🟩 🟩 🟩 🟦
Fruit • bread • yogurt or cottage cheese • a few nuts
A snack is not a mistake. This is not about restriction, but about eating intelligently.
Mental goal: avoid an energy slump + stay ready
🌙 DINNER — Recover and prepare for tomorrow
🟨 🟨 🟥 🟥 🟥 🟩 🟩 🟩 🟩 🟦
Vegetables • protein • starchy foods suited to the day’s activity • healthy fats
After a demanding training session, the proportion of carbohydrates can naturally increase.
Mental goal: recovery + sleep + readiness for the next day
🧩 At a glance
| Meal | 🍞 Carbohydrates | 🍳 Protein | 🥑 Fats | 🥦 Fruits & vegetables |
|---|---|---|---|---|
| 🌅 Breakfast | ● ● ● ● | ● ● ● | ● ● | ● ● |
| 🕛 Lunch | ● ● ● | ● ● ● | ● ● | ● ● ● ● |
| 🍌 Snack | ● ● ● | ● ● | ● | ● ● ● |
| 🌙 Dinner | ● ● | ● ● ● | ● ● | ● ● ● ● |
● = relative importance within the meal: a visual guide, not an amount to weigh.
💧 Water: the invisible fifth component
You can have an excellent diet and still be missing the essential: water.
Fatigue, reduced alertness, difficulty concentrating, cramps, or reduced physical capacity can accompany insufficient hydration.
A guideline: around 2 to 3 liters per day, adjusted for the heat, body size, and physical activity.
For athletes, drinking water is part of training.
🧠 Eating well also helps prepare your mind
A brain short on energy is not in the best position to concentrate, manage emotions, maintain motivation, or make a good decision under pressure.
That, too, is mental preparation.
We can work on self-confidence, concentration, stress management, or letting go. But the mind never functions independently of the body.
Eating well does not mean trying to achieve a perfect diet.
It simply means giving the body—and the brain—what they need to perform.
📌 In summary
At every meal, think about the four building blocks:
🍞 Carbohydrates + 🍳 Protein + 🥑 Fats + 🥦 Fruits & vegetables
Hydrate regularly, adapt portions to your activity, and avoid thinking only in terms of restrictions.
Performance starts on the plate, too.
🍔 Fast food: yes, but…
1 to 2 times a week: acceptable. Provided the other meals are balanced. Avoid it the day before a match or a physical test.
Mental preparation by age group
👦 Under 13
🧑 Under 17
👨 Adults