1. Introduction The sensation of the lower back locking up after getting out of a car is primarily caused by the biomechanical stress of prolonged, static sitting, which dehydrates the intervertebral discs and shortens the iliopsoas muscles. While seated, the lumbar spine loses its natural lordotic curve, placing immense compressive force on the anterior discs … Read more
1. Introduction Severe lower back stiffness when trying to stand up typically indicates mechanical joint dysfunction or muscular deconditioning within the lumbar spine. When the human body remains seated, the lumbar discs undergo sustained compression, and the synovial fluid within the facet joints thickens. This lack of movement triggers a temporary rigidity that becomes acutely … Read more
1. Introduction Tight hip flexors can absolutely cause chronic lower back stiffness through a biomechanical chain reaction that alters the natural alignment of the pelvis and lumbar spine. When the muscles responsible for bringing the knee toward the chest become shortened and chronically contracted, they exert a continuous, forward-pulling force on the lumbar vertebrae and … Read more