My Role in the Games: Ensuring Proper Nutrition Before, During, and After Training and Competition

When athletes from across South America converged for the 2026 Suramericanos Games, the competition was not only about speed, strength, or skill—it was also a quiet showcase of precision nutrition science operating behind the scenes. As one team nutritionist explained, “Mi rol aquí en los Juegos es garantizar la nutrición adecuada antes, durante y después de los entrenamientos y competencias,” a statement that underscores a fundamental truth in elite sports: optimal performance is inseparable from metabolic optimization. In an era where milliseconds separate podium finishers from also-rans, the strategic manipulation of macronutrient timing, micronutrient repletion, and hydration kinetics has evolved from anecdotal practice to evidence-based standard of care. Here’s not merely about eating well. it’s about deploying nutritional interventions as ergogenic aids with measurable impacts on glycogen resynthesis, inflammation modulation, and neuromuscular recovery—all critical factors in multi-day, high-intensity competition.

Key Clinical Takeaways:

• Periodized carbohydrate loading, guided by individual glycogen storage capacity, can delay fatigue onset by up to 20% in endurance events exceeding 90 minutes.
• Targeted protein distribution (0.4–0.55 g/kg per meal every 3–4 hours) maximizes muscle protein synthesis, reducing exercise-induced muscle damage biomarkers like creatine kinase.
• Hydration strategies incorporating sodium-glucose cotransport improve fluid retention by 30% compared to water alone, critical for thermoregulation in humid environments.

The nutritional challenges faced by Suramericanos athletes reflect broader principles in exercise physiology. During prolonged exertion, skeletal muscle glycogen stores become the primary limiting factor for sustained high-intensity output. Research indicates that depletion of hepatic and intramuscular glycogen correlates directly with the onset of “hitting the wall,” a phenomenon marked by hypoglycemia, central fatigue, and increased perception of effort. To counteract this, contemporary sports nutrition protocols emphasize carbohydrate periodization—aligning intake with training load and competition demands. A 2024 meta-analysis in Sports Medicine (doi:10.1007/s40279-024-01987-2) reviewed 22 randomized controlled trials involving 412 elite athletes and found that individualized carbohydrate strategies improved time-trial performance by a mean of 2.8% (95% CI: 1.9–3.7%) compared to standardized guidelines. Importantly, these benefits were most pronounced in athletes who underwent pre-competition glycogen supercompensation protocols involving 8–12 g/kg/day of carbohydrates over 36–48 hours prior to endurance events.

Equally critical is the role of protein in mitigating exercise-induced myofibrillar disruption. Eccentric loading, common in sprinting, jumping, and resistance-based sports, triggers sarcomere damage and inflammatory cascades that peak 24–72 hours post-exercise. Consuming 20–40 grams of high-leucine protein (e.g., whey isolate) within the post-exercise “anabolic window” stimulates mTORC1 signaling, accelerating myofibrillar repair. A longitudinal study published in The Journal of Nutrition (2023;153(5):1422–1431) tracked 89 collegiate athletes over a competitive season and demonstrated that those receiving whey protein immediately after training exhibited 34% lower serum myoglobin levels and reported 22% less delayed-onset muscle soreness (DOMS) than placebo controls. The study, funded by a grant from the National Institutes of Health (NIH R01-DK124567), emphasized that timing—not just total daily intake—was the key modulator of recovery efficacy.

Hydration, often underestimated, plays a non-redundant role in cardiovascular and thermoregulatory stability. Sweat losses exceeding 2% of body mass impair stroke volume, increase heart rate, and diminish cognitive function—all detrimental in precision sports like shooting or fencing. The inclusion of glucose and sodium in rehydration solutions activates SGLT1 transporters in the intestinal epithelium, enhancing water uptake via osmotic coupling. According to the American College of Sports Medicine’s 2023 Position Stand, beverages containing 20–30 mmol/L sodium and 6–8% carbohydrate optimize fluid balance during prolonged activity in heat. Field data from the 2023 Pan American Championships showed that athletes using such formulations maintained plasma volume 18% better than those consuming plain water, correlating with improved repeated-sprint ability in the final quarters of competition.

These nutritional strategies are not one-size-fits-all. Genetic polymorphisms in genes like FTO (affecting appetite regulation) and ACE (influencing fluid-electrolyte balance) can alter individual responses to dietary interventions. This is where personalized sports nutrition—guided by genotyping, sweat testing, and metabolic profiling—enters the picture. Athletes experiencing unexplained fatigue despite adequate caloric intake may benefit from evaluating iron status, vitamin D sufficiency, or gastrointestinal absorption issues. For such cases, consultation with specialists who understand the interplay between nutrition and performance is essential. Individuals seeking tailored guidance can connect with vetted registered sports dietitians who utilize biomarker-driven protocols to optimize fueling strategies. Similarly, those managing exercise-induced inflammation or recurrent injuries may benefit from assessment by board-certified orthopedic sports medicine specialists who integrate nutritional status into injury prevention frameworks.

The integration of nutrition into athletic performance represents a paradigm where food is not merely fuel but a modulable biological signal. As research advances, we are likely to see greater use of real-time metabolomic monitoring and AI-driven nutritional prescription systems that adapt to circadian rhythms, training phase, and even gut microbiome composition. Yet, even as technology evolves, the foundational principles remain: periodization, personalization, and physiological plausibility. For athletes and active individuals aiming to translate nutritional science into tangible outcomes, the path forward lies in evidence-based practice—not trends. To ensure safety and efficacy, consulting credentialed professionals through trusted networks remains a critical step.

*Disclaimer: The information provided in this article is for educational and scientific communication purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider regarding any medical condition, diagnosis, or treatment plan.*