What percentage of body weight is muscle?

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Study for the AAMI Certified Associate in Biomedical Technology Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What percentage of body weight is muscle?

Explanation:
Muscle mass as a share of body weight is typically around 40% in a typical adult. This reflects the amount of skeletal muscle tissue relative to total body weight. While body composition varies—women often have a lower proportion (around 30–35%), and highly trained athletes can have higher values—the standard reference for a general adult is about 40%. The other options are less representative of the common estimate: 30% is closer to the female average, while 50% or 60% would indicate unusually high muscle mass for the general population. So 40% is the best answer.

Muscle mass as a share of body weight is typically around 40% in a typical adult. This reflects the amount of skeletal muscle tissue relative to total body weight. While body composition varies—women often have a lower proportion (around 30–35%), and highly trained athletes can have higher values—the standard reference for a general adult is about 40%. The other options are less representative of the common estimate: 30% is closer to the female average, while 50% or 60% would indicate unusually high muscle mass for the general population. So 40% is the best answer.

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