A high-protein diet supports muscle maintenance by supplying the essential amino acids necessary for muscle repair and growth. Post-exercise, protein intake is critical to stimulate muscle protein synthesis, which is vital for recovery. This dietary approach helps prevent muscle loss, especially in conjunction with resistance training. Additionally, protein can aid in maintaining a healthy metabolic rate, as it requires more energy to digest compared to fats and carbohydrates. Overall, a high-protein diet contributes to better muscle health and functional fitness.