Adult-Gerontology Clinical Nurse Specialist (CNS) Practice Exam

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What percentage of total body muscle mass does a healthy young adult have?

  1. 25%

  2. 30%

  3. 35%

  4. 40%

The correct answer is: 30%

A healthy young adult typically has around 30% of their total body mass constituted by muscle. This percentage can vary based on several factors such as sex, fitness level, and overall health. Generally, young males tend to have a higher percentage of muscle mass compared to females, but on average, 30% is a widely accepted estimate for healthy young adults. Muscle mass plays a crucial role in overall metabolism, strength, and physical performance. Understanding this percentage helps healthcare providers assess whether an individual may be underweight, overweight, or at risk for sarcopenia, especially as they age. This knowledge is vital when considering rehabilitation programs, dietary needs, and physical activity recommendations for individuals at various life stages.

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