What is the primary role of protein in sport nutrition?

The primary role of protein in sport nutrition is muscle repair and growth. After exercise, particularly resistance training or intensive cardiovascular workouts, muscle fibers experience microscopic damage. Protein provides the essential amino acids necessary for repairing these damaged fibers and facilitating muscle hypertrophy, which is the increase in muscle size and strength. This process is crucial for athletes and those who engage in regular physical activity, as it helps enhance performance and recovery.

Additionally, proteins play a vital role in various physiological functions beyond just muscle repair, such as the production of enzymes, hormones, and other significant biological molecules. However, in the context of sport nutrition, the focus is often on the role of protein in supporting muscle recovery and promoting adaptive changes after training.