CSCS Practice Test
Exercise Technique Practice Test
Question 1 of 3
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Which of the following decreases when a muscle fully contracts?
The Z-line separates each sarcomere. The H-zone is the center of the sarcomere and the M-line is where adjacent myosin filaments anchor on to each other. When muscle contracts the H-zone and I-band both decrease as the Z-lines are pulled towards each other.