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ACSM Personal Trainer

Category - Initial Client Consultation and Assessment

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What are the characteristics of Type II (fast twitch) muscle fibers?

Larger size
More capillaries, mitochondria and myoglobin
More force produced
Answers A and C

Explanation

Answer: D - Type II (fast twitch) muscle fibers are characterized by their larger size and ability to produce more force. Type II muscle fibers actually have LESS capillaries, mitochondria, and myoglobin than Type I muscle fibers.

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