Objective: The main objective of this study was to analyze the nutritional intake of high-level athletes specialties in long and middle distance during an athletic season to identify possible defi ciencies. Methods: To carry out the study, we proceeded to assess the diet and different intake levels of macronutrients (carbohydrates, fat and proteins); and changes that occur in the concentration of these elements were analyzed 4 different times of the season: at baseline and at 3, 6 and 9 months of training. The sample consisted of a group of 23 elite endurance athletes with a minimum of 5 years of training, a weekly charge between 14-20 hours, and an average of 100-120 miles a week. The procedure consisted of nutritional register for a period of three consecutive days in the 4 different moments of the season. Results: The results show signifi cant increases (p < 0,05) in protein intake between 3-9 months. Conclusion: Nutritional intake in endurance athletes increases throughout the athletic season, with lower intake in macronutrients than recommended by the scientifi c community, and increases in protein intake during periods of spring and summer, according to competition periods. ResumenObjetivo: el objetivo de este estudio fue analizar la ingesta nutricional de atletas de alto nivel de las especialidades de fondo y medio fondo, durante una temporada atlética, para detectar posibles defi ciencias. Métodos: para llevar a cabo el estudio, se procedió a evaluar la dieta y las diferentes concentraciones de los macronutrientes (glúcidos, lípidos y proteínas) y los diferentes tipos de ácidos grasos, en cuatro momentos diferentes de la temporada: al inicio y a los 3, 6 y 9 meses de entrenamiento. La muestra estuvo constituida por un grupo formado por 23 atletas de fondo y medio fondo con un mínimo de 5 años de entrenamiento, una carga semanal de entre 14-20 horas y un volumen de 100-120 km semanales. El procedimiento consistió en el registro nutricional durante un periodo de tres días consecutivos, en los cuatro momentos establecidos. Resultados: los resultados obtenidos muestran incrementos signifi cativos (p < 0,05) en la ingesta de proteínas entre los 3-9 meses. Conclusión: la ingesta energética en atletas de fondo y medio fondo va aumentando a lo largo de la temporada deportiva, con cantidades de macronutrientes inferiores a las recomendadas por la comunidad científi ca, y con incrementos en la ingesta de proteínas en periodos de primavera y verano, coincidiendo con momentos de competición.
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