Which statement best describes aging-related changes in muscles?

• A. Muscle wasting
• B. Muscle hypertrophy
• C. Increased strength
• D. No change in muscle function

Answer: (A)

Aging commonly leads to sarcopenia, a progressive loss of skeletal muscle mass and function. The statement muscle wasting best describes aging-related changes because, over time, there is a reduction in total muscle fibers and motor units, along with changes in muscle quality and composition that include increased fat infiltration and reduced anabolic capacity. This combination results in decreased strength and slower movement, which can impact daily activities and independence. While regular resistance training can help mitigate these effects, the typical aging process without such stimulus shows a decline in muscle mass and function. The other options don’t fit because hypertrophy means growing muscle, which is not a standard aging change; increased strength is also not characteristic of aging; and no change in muscle function ignores the common decline seen with age.