A balanced nutrition guide for growing athletes — what to eat before and after training, and how much protein a teenager needs.

The energy needs of a growing body are higher than those of an adult — especially when a child or teenager actively plays sports. Inadequate nutrition can lead not only to poorer athletic performance but also to growth disorders, weak bones, and hormonal imbalance.
Key challenges: sufficient calorie intake, an appropriate balance of proteins, carbohydrates, and fats, and adequate micronutrients (iron, calcium, vitamin D). A young body is especially sensitive to nutrient deficiencies — even a short-term deficit can have long-term consequences for growth and development.
Protein: 1.2–1.8 g/kg of body weight per day. For example, a 50 kg teenager needs 60–90 g of protein daily. Best sources: chicken, fish, eggs, cottage cheese, legumes, tofu.
Carbohydrates: 45–65 % of daily calories. The main fuel for an athlete! Whole-grain products, fruits, vegetables. Avoid processed sugars and sweetened drinks.
Fats: 25–35 % of daily calories. Important for hormone production and brain function. Prefer: nuts, avocados, olive oil, fatty fish (omega-3 fatty acids).
2–3 hours before training: A complete meal — carbohydrates + proteins (e.g., chicken with rice, whole-grain pasta with cottage cheese).
30–60 min. before: A light snack — a banana, a granola bar, toast with honey. Avoid hard-to-digest foods!
Within 30 min. after training: Proteins + carbohydrates for recovery — a milk shake, Greek yogurt with fruit, a protein bar. This is the so-called anabolic window.
After 1–2 hours: A complete meal rich in proteins and carbohydrates.
Children and teenagers dehydrate faster than adults because their thermoregulation is not yet fully developed. Even 1–2 % dehydration can significantly worsen athletic performance.
Recommendations:
Sports drinks required only when >For 60 min. of intense training in the heat. For everyday training, water is enough.
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