Can gait asymmetry or poor pelvic stabilization provoke sacroiliac pain during walking?

Walking does alternately load the pelvic ring and sacroiliac joints (SIJs), but the extension from this mechanics to gait asymmetry or poor stabilization causing progressively step-provoked SIJ pain remains plausible rather than established.

Biomechanical and mechanistic evidence

• Gait models using motion/force data estimate greater superior–inferior shear at the stance-side SIJ during single support, with load distribution changing during double support. Pubic-joint loading tracks SIJ loading, consistent with force sharing across the pelvic ring.
• Finite-element simulations predict phase-dependent SIJ mechanics: sacral nutation during stance and counternutation during swing, with stress concentrated near the SIJ. Pelvic/trunk muscle–ligament systems—including gluteus maximus, abdominal muscles, and their fascial connections—can increase compression and resistance to shear (“force closure”).
• These are convergent biomechanical findings, but estimated joint forces and motion come chiefly from models; direct in-vivo SIJ force measurement during unrestricted walking is not established.

Clinical associations

• Walking commonly aggravates SIJ pain, and painful SIJ presentations may include antalgic gait, shortened stride, painful stance, reduced hip extension, and altered pelvic motion.
• Small observational studies of unilateral SIJ dysfunction report affected-side reductions in hip extension and peak vertical ground-reaction force, greater gait asymmetry, and altered step width/pelvic movement.
• In a treadmill case-control study of 6 women with unilateral SIJ dysfunction versus 6 controls, affected participants showed reduced gluteus-maximus/contralateral-latissimus-dorsi coactivation, an altered coordination pattern relevant to pelvic force closure.

Interpretation for practice

• These patterns may contribute to symptoms, but they can also be consequences of pain-related guarding. No study has shown that inducing or quantifying asymmetry or stabilization impairment causes SIJ pain to accumulate over a defined number of steps.
• Pelvic belts and stabilization-oriented exercise may improve walking or symptoms in some patients, but mechanism-specific and standalone treatment evidence is low-certainty.

Bottom line

• Alternating SIJ loading in walking is well supported biomechanically. Gait asymmetry and impaired lumbopelvic stabilization are credible symptom modifiers, not proven causes of step-by-step SIJ pain; hip, lumbar, and other pelvic pain sources should also be distinguished clinically.