It usually takes about 3 months to be able to bend over after lumbar fixation and fusion. 1. Lumbar fixation and fusion is a surgical procedure that removes the joints between the lumbar vertebrae and the vertebrae, and then inserts and fixes artificial bone and other materials to fuse the joints between the lumbar vertebrae, which prevents movement of the lumbar vertebrae and helps to stabilize the spine. 2. It takes about 3 months after the surgery for the lumbar fusion to heal and stabilize before activities such as bending can be performed. 3. After lumbar fixation and fusion, it is necessary to pay more attention to bed rest, avoiding lumbar activities and overwork, which can help reduce the stress on the lumbar region and promote the recovery of the lumbar spinal fusion. 4. After 2 months, the lumbar fusion is relatively stable, and you can wear a waist cuff to go down to the ground moderately, and gradually carry out functional exercises. After 3 months, the waist cuff can be removed and bending activities can be started gradually. After lumbar fixation and fusion, strict bed rest is required, and regular medical checkups are needed.