Exercises after lumbar 4~5 sacral 1 fusion are generally carried out according to the first stage (0~6 weeks), the second stage (6~12 weeks) and the third stage (12~24 weeks). 1. Stage 1 (0~6 weeks): In this stage, you can do some daily walking exercises and joint activities. You can also do abdominal breathing exercises, i.e. lie on your back, inhale through your nose, puff up your lower abdomen, hold it at the maximum for 2 seconds and then slowly exhale through your mouth for 2~3 minutes each time, 2~3 times a day. 2. Second stage (6th~12th week): In this stage, you can do neutral stability exercise, such as hip bridge activity. Walking at this stage can be gradually increased from 20 minutes to 30 minutes. 3. Stage 3 (12~24 weeks): This stage is dynamic stabilization. You can do some aerobic exercise training, such as clam exercise, and gradually tolerate walking for 30 to 60 minutes a day (walking, stairs, etc.). Normal life can be lived normally three months after surgery, and heavy lifting can be started after six months. Remember to wear a hard lumbar support during the three months to protect the operated spinal segments and avoid recurrence. Exercise is recommended under the direction of your doctor.