Final answer:
The recommended protein intake for athletes who participate in high-intensity endurance exercise is 1.2-1.4 g/kg/day. This intake supports energy metabolism and muscle repair. Athletes must also consider the quality of proteins and adjust the intake based on the food source, particularly in the case of vegetarian athletes.
Step-by-step explanation:
The recommended intake of protein for athletes who participate in high-intensity endurance exercise is 1.2-1.4 g/kg/day. This level of protein intake supports metabolic reactions that generate ATP, and aids in muscle maintenance, growth, and repair. It is particularly important for those engaged in such demanding physical activities, as dietary protein assists with the metabolic functions and structural maintenance required for sustained performance.
While fat should constitute 20-35% of an athlete's energy intake, and carbohydrates should be increased to about 3-10 g/kg/day based on the type of training, proteins have a unique role in the athlete's diet. High-quality protein sources like meats, dairy, and eggs are essential as they contain all the essential amino acids needed for body functions. It is also crucial for vegetarian athletes to consume higher amounts of protein to compensate for the lower digestibility and different amino acid patterns of plant-based protein sources.
Overall, a balanced diet for athletes must address not only their macronutrient needs but also adequate micronutrients, ensuring that all aspects of an athlete's nutritional requirements are met to optimize their performance and health.