The QL muscle is actively involved in breathing mechanics, helping to anchor the bottom rib during exhalation, so dysfunction in breathing patterns creates chronic QL overactivation.

factualpending

Speaker

Unidentified Speaker — Why Does Your Left Quadratus Lumborum Hurt? [rffVhQ9JnpI]

Evidence Quote

so it's active in breathing but when you don't have proper breathing mechanics it's going to again it's going to be overactive

Source

Why Does Your Left Quadratus Lumborum Hurt?Neal Hallinan
Created: 8/13/2026, 10:18:19 AM

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