Athletic Training Practice Exam

What is one of the primary functions of carbohydrates in an athlete's diet?

1. Muscle repair

2. Energy source

3. Building hormones

4. Maintaining hydration

The correct answer is: Energy source

Carbohydrates serve as a crucial energy source for athletes, which is why this answer is identified as correct. During physical activity, especially high-intensity exercise, the body primarily relies on carbohydrates to fuel muscle contractions and maintain endurance. When consumed, carbohydrates are broken down into glucose, which is either used instantly for energy or stored in the muscles and liver as glycogen for later use. This stored glycogen is vital for sustaining prolonged exercise, enhancing performance, and allowing athletes to train effectively. While muscle repair, hormone building, and hydration are important aspects of an athlete's diet, they are not the primary function of carbohydrates. Muscle repair is largely dependent on protein intake, which supplies the necessary amino acids for rebuilding muscle tissue. Hormones, on the other hand, are predominantly constructed from proteins and fats, highlighting the distinct roles of various macronutrients in an athlete's nutrition. Lastly, maintaining hydration primarily relates to fluid intake, particularly water and electrolytes, rather than carbohydrates. Thus, the primary role of carbohydrates can be clearly distinguished as providing energy essential for athletic performance.