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Which muscle is not in the posterior spine musculature?

A.      Quadratus lumborum

B.      Intrinsic rotators

C.      Erector spinae

D.     Multifidus muscles

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A. Quadratus lumborum

Reason:  ACSM’s Resources for the Personal Trainer 5th Edition. Lumbar: Chapter 3, Page 107-108.

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