If a muscle increases in size, it may require less neural activation to lift the same load. This is an example of what?

If a muscle increases in size, it may require less neural activation to lift the same load. This is an example of what?

• A. Muscle Hypertrophy
• B. Central Fatigue
• C. Peripheral Fatigue
• D. A Motor Unit Adaptation

Answer: (D)

When a muscle grows larger, its capacity to produce force increases. That means the same load can be lifted with less neural drive because the muscle itself is stronger. The nervous system adapts by becoming more efficient at activating motor units—recruiting the right units and firing them in a coordinated, economical way. In short, the muscle’s increased size allows for the same performance with reduced neural activation due to motor unit adaptations. This isn’t central fatigue, which would decrease the brain’s drive to the muscles, nor peripheral fatigue, which involves the muscle’s ability to generate force dropping due to its own state. It’s also not the structural change itself (hypertrophy) but the neural adjustment in how motor units are controlled in response to that change.

When a muscle grows larger, its capacity to produce force increases. That means the same load can be lifted with less neural drive because the muscle itself is stronger. The nervous system adapts by becoming more efficient at activating motor units—recruiting the right units and firing them in a coordinated, economical way. In short, the muscle’s increased size allows for the same performance with reduced neural activation due to motor unit adaptations.

This isn’t central fatigue, which would decrease the brain’s drive to the muscles, nor peripheral fatigue, which involves the muscle’s ability to generate force dropping due to its own state. It’s also not the structural change itself (hypertrophy) but the neural adjustment in how motor units are controlled in response to that change.