Which pair of muscles are tight (facilitated) in lower cross syndrome?

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Multiple Choice

Which pair of muscles are tight (facilitated) in lower cross syndrome?

In lower cross syndrome, a pattern of muscle imbalance causes the front of the pelvis and lower back to become tight while the abdominal and gluteal muscles are weak. The tight pair are the hip flexors (like the iliopsoas and rectus femoris) and the thoracolumbar extensors (the lower back portion of the erector spinae). Prolonged sitting or poor postural habits keep the hip flexors shortened and the back extensors often chronically engaged to maintain posture, which tilts the pelvis forward and increases the curvature of the lower spine (hyperlordosis). This combination reinforces the pattern: the front-lower-back system tight, the abdominal and gluteal stabilizers weak, leading to the characteristic posture and movement limits. Other options don’t fit this pattern because they involve muscles not typically tight in this syndrome. The latissimus dorsi and trapezius are upper body muscles and not the hallmark of lower cross. The calf muscles (gastrocnemius and soleus) aren’t the primary players in this imbalance. And the pair consisting of the gluteus maximus and abdominals are usually weak in lower cross syndrome, not tight.

In lower cross syndrome, a pattern of muscle imbalance causes the front of the pelvis and lower back to become tight while the abdominal and gluteal muscles are weak. The tight pair are the hip flexors (like the iliopsoas and rectus femoris) and the thoracolumbar extensors (the lower back portion of the erector spinae). Prolonged sitting or poor postural habits keep the hip flexors shortened and the back extensors often chronically engaged to maintain posture, which tilts the pelvis forward and increases the curvature of the lower spine (hyperlordosis). This combination reinforces the pattern: the front-lower-back system tight, the abdominal and gluteal stabilizers weak, leading to the characteristic posture and movement limits.

Other options don’t fit this pattern because they involve muscles not typically tight in this syndrome. The latissimus dorsi and trapezius are upper body muscles and not the hallmark of lower cross. The calf muscles (gastrocnemius and soleus) aren’t the primary players in this imbalance. And the pair consisting of the gluteus maximus and abdominals are usually weak in lower cross syndrome, not tight.

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