Weakness in the lumbar region and inability to complete support are common for the following two reasons: first, the onset of lumbar small joint syndrome can cause pain in the lower back, while weakness in the lumbar region and inability to support the body weight, which is caused by misalignment of the small joints of the lumbar region and synovial imbrication into the joints, the patient has unbearable pain and weakness of the lumbar muscles, requiring immediate bed rest; second, when the lumbar spine is unstable, the lumbar muscles are overloaded for a long time, making it difficult to maintain the stability of the lumbar spine and the stability of the upper body, and serious strain occurs, with the muscles showing soreness and weakness and inability to continue to support and maintain the body in a standing or sitting position.