The optimal age for lumbar fusion surgery is not standardized, but routinely, middle-aged and elderly patients over the age of 50 can undergo lumbar fusion surgery. Lumbar spine fusion surgery is generally applied to patients with lumbar disc herniation, lumbar spondylolisthesis, lumbar spinal stenosis, etc. The so-called fusion surgery is simply to merge two or more vertebrae and remove the discs between the vertebrae, thus restoring the vertebrae to their normal stability and relieving nerve compression. Middle-aged and elderly patients are less likely to engage in heavy physical labor, so this type of surgery can be used. Lumbar fusion surgery itself has certain disadvantages. After the vertebrae are fused, the mobility of the lumbar vertebrae is relatively reduced, and the mobility of the vertebrae in the later stages is compensated for by the interaction between neighboring vertebrae that have been fused, which is still not resolved even with intervertebral foraminoscopic surgery. Therefore, for young patients with relatively high lumbar flexibility who are engaged in heavy manual labor, this surgical procedure is generally not performed.