FiTOUR Primary Nutrition Certificate Practice Test 2025 - Free Nutrition Practice Questions and Study Guide

Protein is crucial for muscle repair and growth because it provides the essential amino acids that are necessary for the synthesis of new muscle tissue. When you engage in exercise, especially resistance training, muscle fibers can undergo stress and sustain minor injuries. Protein aids in the recovery process by supporting the repair of these fibers, allowing them to grow back stronger.

In addition to repairing damaged muscle tissues, protein is vital for the overall anabolic process, where the body builds new cellular structures and supports muscle hypertrophy. Consuming an adequate amount of protein, both post-workout and throughout the day, enhances muscle recovery and promotes growth by facilitating the balance between muscle protein synthesis and breakdown.

While carbohydrates and fats provide energy, they do not play a direct role in muscle repair. Vitamins, while necessary for various bodily functions, also do not serve as the building blocks needed for muscle tissue. Thus, protein stands out as the primary nutrient responsible for muscle repair and growth.