Which of the following muscle groups must be strengthened in order to maintain a healthy back?
A. Abdominals, knee flexors, and hip flexors
B. Abdominals, hip extensors and erector spinae
C. Abdominals, hip flexors and hip extensors
D. Abdominals, hamstrings and hip flexor
Which of the following muscle groups must be strengthened in order to maintain a healthy back?
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answerhappygod
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Which of the following muscle groups must be strengthened in order to maintain a healthy back?
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