Low back pain can bring you to your knees

If there is one muscle that commands respect, it is the quadratus lumborum. The paired QLs stand like sentinels to the left and right of the lower spine. They are the guy wires that help to keep us standing upright. Their most important and under acknowledged task is to act as brakes as we ceaselessly lean forward. Think of the amount of time you lean towards whatever job is at hand.  Without the quadratus lumborum braking this forward motion, your body would flop forward. How do you know that these muscles are reaching the end of their rope?