Which motion follows the initial flexion of the lumbar spine in normal lumbar-pelvic rhythm?

• A. Neutral rotation of the pelvis
• B. Posterior rotation of the pelvis
• C. Anteroposterior glide of the hips
• D. Anterioir rotation of the pelvis

Answer: (D)

In normal lumbar-pelvic rhythm, after the initial flexion of the lumbar spine, there is typically an anterior rotation of the pelvis. This motion allows for further movement and flexion, contributing to the overall motion of bending forward. During this phase, the pelvis tilts forward relative to the femurs, enabling greater flexion at the hips and promoting efficient movement during activities such as reaching down or picking something up.

The anterior rotation is essential for harmonizing the movement between the lumbar spine and the pelvis, ensuring that the spine does not excessively flex beyond its biomechanical limits. This coordinated movement facilitates proper loading and stabilization of the spine and hips, which is crucial in preventing injuries during functional activities.

Understanding this dynamic is fundamental for physical therapists and orthopedic specialists, as it directly relates to the mechanics of movement and the strategies utilized in rehabilitation and exercise programs. It emphasizes the importance of maintaining proper lumbar-pelvic rhythm to optimize performance and reduce the risk of musculoskeletal disorders.