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Questions and Answers
What is the force-couple responsible for an anterior pelvic tilt?
Which muscles are capable of femoral-on-pelvic flexion and can cause anterior pelvic tilt?
What happens to the lumbar spine when there is an anterior pelvic tilt?
What type of lumbopelvic posture optimizes the alignment of the entire spine?
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When does femoral-on-pelvic hip flexion often occur?
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What is required for moderate-to-high-power hip flexion?
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What happens if there is insufficient stabilization from the abdominal muscles during hip flexion?
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What does excessive anterior tilt of the pelvis accentuate?
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What happens when hip flexors pull the lumbar spine further into lordosis?
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What can cause a marked anterior tilt of the pelvis?
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Which muscle group is responsible for an excessive anterior pelvic tilt?
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Which posture optimizes the alignment of the entire spine?
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Study Notes
- An anterior pelvic tilt is performed by a force-couple between hip flexors and low back extensor muscles.
- Any muscle capable of femoral-on-pelvic flexion is equally capable of tilting the pelvis anteriorly.
- Anterior tilt increases lordosis at the lumbar spine, which may cause excessive and chronic loads on local bony tissues.
- A lumbopelvic posture with a normal amount of lumbar lordosis optimizes the alignment of the entire spine.
- Femoral-on-pelvic hip flexion often occurs simultaneously with knee flexion to shorten the functional length of the lower extremity during the swing phase of walking or running.
- The action of moderate-to-high-power hip flexion requires coactivation of the hip flexor and abdominal muscles.
- Without sufficient stabilization from the abdominal muscles, contraction of the hip flexor muscles is inefficiently spent tilting the pelvis anteriorly.
- Excessive anterior tilt of the pelvis accentuates the lumbar lordosis.
- Hip flexors pull the lumbar spine further into lordosis, which may cause low back pain.
- Reduced activation of the rectus abdominis may cause a marked anterior tilt of the pelvis.
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