What percentage of muscle is made up of proteins?

Muscle tissue is composed of a significant amount of protein, which plays a critical role in muscle structure and function. Approximately 20 percent of muscle mass is made up of proteins such as actin and myosin, which are essential for muscle contraction and overall muscle health. These proteins are vital for muscle repair, growth, and strength.

The options that suggest other percentages do not reflect the commonly accepted scientific understanding of muscle composition. A lower percentage would underestimate the role of proteins in muscle, which is primarily composed of these vital components. A higher percentage would suggest an unrealistic proportion of muscle mass attributable to proteins. Therefore, the more accurate estimate of protein content in muscle is around 20 percent. This knowledge is essential for personal trainers, as it relates to the importance of protein intake in clients’ diets for muscle development and recovery.