What is the main role of protein in strength training?

The primary role of protein in strength training is to assist in muscle repair and growth. When engaging in resistance training, muscle fibers undergo stress and create micro-tears. Protein plays a crucial role in the recovery process by providing the necessary amino acids that help repair these damaged fibers, leading to increased muscle size and strength over time. This process is known as muscle protein synthesis, and it is essential for athletes and individuals engaged in strength training to consume adequate protein to support their training goals and recovery.

While energy is necessary for workouts, carbohydrates and fats are the main sources for fueling exercise, rather than protein. Moreover, protein can be involved in fat loss by helping maintain muscle during a calorie deficit, but its primary function in the context of strength training is repair and growth. Although a well-rounded fitness routine can enhance aerobic capacity, protein alone does not directly influence this aspect; aerobic capacity improvements are more related to cardiovascular conditioning and endurance training. Thus, the most relevant role of protein in the context of strength training is its contribution to muscle repair and growth.