Sports Nutrition: From the Lab to the Kitchen in Professional Soccer | Cristian Petri & Alfredo Santalla - FSI Talks #17

Sports nutrition in professional football is no longer about following a generic diet. At elite clubs, every meal is designed around the player's position, training load, match schedule and individual physiological profile.

In episode eighteen of FSI Talks, Alfredo Santalla, professor of exercise physiology at the Universidad Pablo de Olavide, speaks with Cristian Petri, nutritionist at ACF Fiorentina and Chief Nutritional Officer of the Italian Rugby Federation. Together they analyse how nutritional science translates into daily practice in Serie A to optimise football performance.

Throughout the conversation they address the real challenges of working as a nutritionist in elite football: from designing personalised meal plans to creative supplementation, scientific monitoring and player nutritional education.

How sports nutrition works in professional football

The greatest challenge in high-performance football nutrition is not knowing the science — it is translating it into meals that players actually want to eat. This is the premise at the heart of Cristian Petri's daily work at Fiorentina.

For Petri, the collaboration between the nutritionist and the chef is just as important as the scientific evidence. The nutritionist designs the nutritional strategy based on each player's physiological data. The chef transforms it into an appealing and enjoyable gastronomic proposal.

This union between science and cooking is what allows players not only to follow their nutritional plans, but to enjoy them. Long-term adherence depends as much on the quality of the plan as on the pleasure of eating it.

Personalised meal plans for footballers: how they are designed at an elite club

Designing a personalised meal plan for professional footballers means balancing athletic performance, digestive health and the player's daily motivation. At Fiorentina, nutritional plans are constantly adjusted according to multiple variables.

The factors that shape each player's nutritional planning include:

• Position on the pitch and the associated effort profile
• Training load on each given day
• Match frequency and fixture congestion
• Travel schedules and time spent between games
• Individual food preferences and each player's personal relationship with food

The goal is not for all players to eat the same thing, but for each one to receive exactly what they need at every point in the season. Variety is not only a health tool — it is a key factor in maintaining nutritional motivation across a campaign of more than sixty matches.

Post-match nutrition in football: what players eat to recover

The post-match window is one of the most critical moments in a professional footballer's nutritional planning. The priority in these hours is not to eat perfectly, but to replenish spent energy as quickly as possible.

After each match, the player's body needs to restore muscle glycogen stores, rehydrate properly and rebalance the hormonal balance disrupted by competitive effort.

The post-match recovery protocol at Fiorentina follows a structured sequence:

• Recovery shakes in the dressing room immediately after the final whistle
• A solid meal rich in carbohydrates and protein in the hours that follow
• Specific snacks during travel to maintain adequate intake away from the training ground

During away trips, the nutrition staff prepares individualised bags containing options such as energy bars, protein yoghurts and legume-based snacks. This ensures players maintain optimal intake even when away from the club's facilities.

Sports supplementation in football: how to get players to stick to their protocol

Sports supplementation is only effective if the player takes it consistently throughout the entire season. This is the starting point of Petri's approach, which combines science, gastronomic creativity and player knowledge to turn something obligatory into something desirable.

Rather than imposing supplements in formats that players reject, Petri adapts the presentation of each supplement to the individual tastes and preferences of each footballer. Protein served as ice cream, creatine incorporated into refreshing non-alcoholic drinks, or natural smoothies are some of the solutions he applies in his daily work.

This approach — gastronomic innovation applied to performance — allows nutritional consistency to be maintained throughout high-demand seasons, where fatigue and saturation can lead players to abandon their supplementation protocols.

The most commonly used supplements in elite football include:

• Whey protein for muscle recovery after training and matches
• Creatine for maintaining strength and power output throughout the season
• Fast-absorbing carbohydrates for glycogen replenishment
• Probiotics for gut microbiome health and inflammation reduction
• Electrolytes for rehydration and neuromuscular performance maintenance

Probiotics, biomarkers and inflammation: the science behind footballer nutrition

Sports nutrition in elite football relies increasingly on continuous scientific monitoring to personalise each player's protocol. At Fiorentina, this translates into regular assessments that go far beyond weight control or body composition tracking.

The parameters analysed on a regular basis include:

• Gut microbiota, to tailor probiotic and prebiotic supplementation
• Cortisol and testosterone levels, as indicators of hormonal recovery status
• Inflammatory biomarkers, to detect chronic inflammation states affecting performance

When the data indicates that a player has not recovered properly after a match or a period of high training load, the nutritional protocol is adjusted with targeted supplementation to accelerate that recovery process.

This integration of sports nutrition, exercise physiology and sports medicine is what allows elite clubs to maintain player availability throughout seasons of more than sixty matches.

Nutritional education in football: why forcing players never works

The role of a nutritionist at a professional football club goes far beyond calculating macronutrients or designing menus. It means understanding the player as a person, recognising their emotional relationship with food and guiding them through a process of habit change that, to be lasting, must be voluntary.

Imposing dietary restrictions without explaining the reasons behind them does not produce real change. Educating players on the concrete benefits of each nutritional decision, adapting the message to their profile and motivation, is what generates lasting transformation.

The three keys to effective nutritional education in high-performance football are:

• Understanding the personal and emotional context of each player's relationship with food
• Motivating with concrete arguments and visible results, not abstract rules
• Continuously adapting the nutritional plan to the real circumstances of the season

How to work as a sports nutritionist in professional football

The conversation between Alfredo Santalla and Cristian Petri makes it clear that working as a sports nutritionist in professional football requires a combination of solid scientific knowledge, communication skills and applied creativity.

Nutritionists working at elite football clubs need not only to master exercise physiology and sports dietetics, but also to translate that knowledge into high-pressure environments with players from different nationalities, food cultures and motivations.

Sports nutrition in football is a constantly evolving field, where scientific evidence, gastronomic innovation and the psychology of eating behaviour converge to make the difference between an available player and an injured or fatigued one.

If you want to train as a sports nutritionist specialising in football and work at elite clubs, FSI Training offers specialist education designed around real professional practice.