CanFitPro Personal Training Specialist Practice Test

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Which muscles are weak in lower crossed syndrome?

Tensor Fasciae Latae and Lumbar portion of erector spinae
Proximal hamstrings and Gluteus minimus
Rectus femoris and Hip Adductors
Upper trapezius and Pectorals

The correct answer is: Proximal hamstrings and Gluteus minimus

In lower crossed syndrome, the hip flexors and low back muscles (including the lumbar portion of the erector spinae) become tight and overactive, while the hip extensors and glutes (including the proximal hamstrings and gluteus minimus) become weak and underactive. This leads to an anterior pelvic tilt, excessive lumbar lordosis, and possibly lower back pain. Option A (Tensor Fasciae Latae and Lumbar portion of erector spinae) and C (Rectus femoris and Hip Adductors) both involve muscles that become tight in lower crossed syndrome, not weak. Option D (Upper trapezius and Pectorals) involves muscles in the upper body, which are not typically affected in lower crossed syndrome. Therefore, option B is the most accurate answer.