Which of the following nutrients plays a key role in muscle recovery after exercise?

Protein plays a key role in muscle recovery after exercise due to its essential function in repairing and building muscle tissue. When you engage in physical activity, especially strength training, microscopic damage occurs in the muscle fibers. This is a normal part of the muscle-building process, known as muscle hypertrophy, which requires adequate nutrition for effective recovery.

Proteins are composed of amino acids, some of which are essential and must be obtained through diet. After exercise, particularly resistance training, the body needs these amino acids to facilitate the repair of muscle fibers and to stimulate muscle protein synthesis. Consuming protein post-exercise helps to enhance recovery, reduce muscle soreness, and promote muscle growth.

In contrast, while carbohydrates are also important for replenishing glycogen stores and providing energy for recovery, their primary role is not directly related to muscle repair. Fats are primarily a source of long-term energy and are less involved in the immediate recovery process after exercise. Vitamins, while essential for overall health and well-being, do not directly contribute to muscle repair and recovery. Therefore, protein is the crucial nutrient in the context of muscle recovery after exercise.