Why does my lower back lock up completely when I try to stand up from a couch?
1. Introduction A lower back that locks up when attempting to stand from a couch is typically caused by acute muscular spasms or stiffness in the lumbar facet joints. Prolonged sitting in a flexed posture stretches the posterior ligaments and compresses the spinal discs, prompting the surrounding muscles to seize protectively when suddenly required to … Read more