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NSCA - CSCS Chapter 1-22 review questions & Answers, 100% Accurate, rated A+
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NSCA - CSCS Chapter 1-22 review questions & Answers, 100% Accurate, rated A+ During a muscle contraction what structures do the cross bridges attach to? - -actin What substance helps regulate muscle actions? - -calcium What substance excites the muscle fibers of a motor unit? - -acetylch...
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