Core, Lumbo-Pelvic-Hip Complex, and Spinal Stabilization
Core, Lumbo-Pelvic-Hip Complex, and Spinal Stabilization
This domain tests the difference between local stabilizers and global movers, and how to train stability without provoking low-back pain. Expect exercise selection, breathing, and progression questions.
Core rules
- Local stabilizers: transversus abdominis, multifidus, pelvic floor, diaphragm, and internal oblique. They provide segmental stiffness and respond to low load, coordination, and breathing.
- Global stabilizers: external oblique, quadratus lumborum, and portions of the erector spinae. Global movers: rectus abdominis, latissimus dorsi, and iliopsoas. These produce movement and absorb larger loads.
- Drawing-in: gentle co-contraction of the deep abdominals and pelvic floor while breathing, not a maximal brace or breath hold.
- Bracing: higher-level co-contraction for load; use after drawing-in control is established.
- Train anti-extension, anti-rotation, anti-lateral flexion, and hip dissociation. Progress from supine to quadruped to standing, then load.
- Precautions: low-back pain, disc pathology, pregnancy, and osteoporosis require modified positions and medical guidance. Avoid loaded spinal flexion and rotation in osteoporosis.
Worked example
A client's plank causes low-back arching and breath holding. Reasoning: the global movers are dominating and the local stabilizers are not controlling the pelvis. Regress to a dead bug with a drawing-in breath, then a bird dog, then a plank with a shorter lever. The exam rewards regression and breathing, not more plank.
Traps
- Confusing drawing-in with maximal bracing.
- Training only rectus abdominis and calling it core stability.
- Progressing load before neutral spine and breathing are consistent.