Final answer:
Consuming high-quality proteins before exercising helps limit muscle breakdown by providing the necessary nutrients for muscle repair and growth, with the recommended intake ranging from 1.2 to 2.0 g/kg/day for athletes. The correct option is (C).
Step-by-step explanation:
Consuming high quality proteins before exercising is essential to limit how much muscle your body breaks down during exercise. Protein is necessary to support metabolic reactions for generating ATP and to assist muscles with maintenance, growth, and repair. It is recommended that athletes consume 1.2 to 2.0 g/kg/day of protein to support their physical activities. Higher intakes may be needed for intense training or when reducing energy intake. Also, carbohydrates and fats play a crucial role in sparing proteins for these functions by providing the required energy, allowing proteins to be used for anabolic or constructive purposes.
In contrast, consuming high levels of fats, while necessary in a balanced diet, or carbohydrates alone before exercising, may not directly prevent muscle breakdown as effectively as protein intake.