NASM Personal Trainer

Category - Sciences

What are the characteristics of Type II (fast twitch) muscle fibers?
  1. Larger size
  2. More capillaries, mitochondria, and myoglobin
  3. More force produced
  4. 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 fewer capillaries, mitochondria, and myoglobin than Type I muscle fibers.
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