Practice Quiz

ACSM Personal Trainer

Category - Exercise Programming and Implementation

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An individual’s total number of muscle fibers is a fixed amount by the time of adolescence, but what type of muscular growth changes can still occur beyond this developmental stage?
  1. Muscle atrophy resulting in increased muscle mass
  2. Muscle hypertrophy resulting in increased muscle mass
  3. No changes are possible to affect muscle growth past puberty except cutting overall body fat percentage for improved appearance of muscle
  4. Affecting hormonal rates through medical intervention to increase muscle fiber counts
Explanation
Answer: B - An individual’s total number of muscle fibers is a fixed amount by the time of adolescence, but muscle hypertrophy resulting in increased muscle mass can still occur beyond this developmental stage. This is an increase in the size of the muscle fiber, but not the actual number of fibers present.
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