How does an anterior pelvic tilt affect the kinematics of the lumbar spine?
extends the lumbar spine and increases lordosis
Anterior pelvic tilt is a postural deviation in which the pelvis tilts forward, causing the front of the hip bone to be lower than the back. This creates an excessive lumbar curve and increases the lordosis of the lumbar spine. This abnormal curvature of the lumbar spine may lead to various musculoskeletal issues.
The kinematics of the lumbar spine is closely related to the pelvic position, as the lumbar spine’s curvature is dependent on the pelvic tilt angle. In anterior pelvic tilt, the increased lordosis of the lumbar spine puts excessive stress on the spinal discs, facet joints, and associated ligaments and muscles. This can lead to muscular imbalances, spinal stenosis, nerve impingement, or disc herniation. Moreover, since the lumbar spine is more extended in anterior pelvic tilt, it reduces the ability of the spine to absorb shock and increases the risk for low back pain and injuries.
In brief, an anterior pelvic tilt can significantly alter the kinematics of the lumbar spine by increasing the lumbar lordosis and thereby putting undue strain on the musculoskeletal structures. Therefore, addressing the causes of anterior pelvic tilt, such as muscular imbalances, postural habits, and tight hip flexors, is essential to prevent and manage lumbar spine problems.
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