02/06/2026
Weak Hips & Low Back Pain
Low back pain is very often not a primary spinal problem but a consequence of altered hip biomechanics. One of the most common patterns seen clinically is a weak gluteus medius combined with a tight quadratus lumborum (QL). This imbalance disrupts pelvic stability, alters load transfer, and increases mechanical stress on the lumbar spine during everyday movements like walking, standing, or single-leg activities.
The gluteus medius is the primary frontal-plane stabilizer of the pelvis. During single-limb stance, it works eccentrically and concentrically to prevent the pelvis from dropping on the unsupported side. When this muscle becomes weak or inhibited, the pelvis tends to shift or drop laterally. To prevent collapse, the body recruits the quadratus lumborum as a compensatory strategy. While this helps maintain upright posture temporarily, it places excessive compressive and shear forces on the lumbar segments.
As the quadratus lumborum becomes overactive and tight, it elevates one side of the pelvis, creating asymmetrical loading across the lumbar spine and sacroiliac region. This leads to increased spinal side-bending moments, facet joint compression, and uneven disc loading. Over time, this repetitive stress contributes to chronic low back pain, stiffness, and reduced spinal movement efficiency.
This imbalance also affects lower-limb alignment. Weak hip abductors allow increased femoral adduction and internal rotation during gait, which shifts the center of mass laterally. To control this deviation, the trunk leans toward the stance leg, further increasing QL activation. This trunk lean increases lumbar compressive forces and reduces the shock-absorbing capacity of the hips, forcing the spine to absorb loads it is not biomechanically designed to handle repeatedly.
In addition, altered hip mechanics reduce effective force transmission between the lower limbs and trunk. The pelvis loses its role as a stable base, leading to poor kinetic chain sequencing. As a result, even simple activities like prolonged standing, stair climbing, or walking can provoke low back symptoms due to continuous muscular guarding and spinal overload.