Weakness of legs and feet after lumbar spinal stenosis surgery is related to incomplete recovery after surgery, which can be promoted by lower limb muscle strength training and lumbar and abdominal muscle strength training. 1. Lower limb muscle strength training: it mainly enhances the active resistance contraction of lower limb muscles, promotes blood circulation, and improves the atrophy and weakness of lower limb muscles. Actions include lower limb elevation, stretching, etc. It should be noted that the exercise should be limited to their own ability, do not over-training. 2. Lumbar and abdominal muscle strength training: by strengthening the lumbar and abdominal muscle strength, improve the stability of the lumbar spine. Actions mainly include “swallow fly” and five-point support, etc., in the training should have a special person on the side of the guidance, do not train on their own, resulting in injuries. After lumbar spinal stenosis surgery, if there is a long period of weakness in the legs and feet, it is necessary to consult a doctor in time to avoid delaying treatment.