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An athlete increases weight lifted by 5% weekly; which adaptation becomes MOST limited by neural drive?

A)Sarcomere protein synthesis rate
B)Motor unit recruitment threshold
C)Capillary density around fibers
D)Glycogen storage within muscle cells

💡 Explanation

Motor unit recruitment is the primary limiter, because progressive overload requires increasingly forceful contractions reliant on neural drive adaptations to activate higher threshold motor units, therefore, neuromuscular efficiency limits strength gains, rather than purely muscular adaptations.

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