What is the primary muscle group involved in trunk flexion while standing during the eccentric phase of the movement?
A. Iliopsoas
B. Rectus Abdominis
C. Erector Spinae
D. Biceps Femoris
What is the primary muscle group involved in trunk flexion while standing during the eccentric phase of the movement?
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What is the primary muscle group involved in trunk flexion while standing during the eccentric phase of the movement?
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