Lumbar spinal stenosis is relatively common, especially in the elderly. It manifests as long-term back and leg pain and inability to walk long distances. Symptoms often get progressively worse and can seriously affect quality of life. Symptoms of lumbar spinal stenosis can last for years, slowly worsening over time. In severe cases, the patient may be able to stand for less than five minutes or walk for 10 or so steps before symptoms appear and he or she cannot continue walking. Patients with lumbar spinal stenosis cannot work standing for long periods of time, cannot go to the mall for long periods of time, and cannot take long walks, but often do not experience symptoms when bending over. Since cycling is bending, a typical patient cannot stand and walk on a flat surface for a long time, but can be asymptomatic when cycling. Therefore, many middle-aged and elderly patients with lumbar spinal stenosis with mild symptoms ride a bicycle or a small tricycle as soon as they go out, and have no choice but to “walk with a car”; in addition, since going up a hill or going upstairs is bending, while going down a hill or going downstairs is holding the waist up, therefore, patients with lumbar spinal stenosis Therefore, patients with lumbar spinal stenosis can go up the hill or up the stairs freely, but it is very difficult to go down the hill or down the stairs; elderly people like children, and when they hold children, they hold their waist, which means that the lumbar vertebrae are in a posterior extension, while when they carry children, their waist is in a forward bending state, so when elderly people with lumbar spinal stenosis hold children, the above-mentioned symptoms of radiated numbness and pain in the lower extremities will be induced, and they will not be able to hold children, while they may walk a long distance with children on their backs. The symptoms may be asymptomatic even after carrying the child for a long distance. After lumbar spinal stenosis, both direct pressure on the nerve root and local venous return obstruction can cause ischemia of the corresponding nerve root. The combined effect of these two mechanisms can result in symptoms of corresponding nerve root dysfunction, which is referred to as lumbar spinal stenosis. Most of the pathogenesis of lumbar spinal stenosis is based on degeneration and aging of the lumbar spine, and is therefore mostly seen in middle-aged and elderly people. Since the lumbar spine is less prone to nerve root compression or ischemia in the upright or posterior extension state, the nerve roots are more prone to compression or ischemia in the flexion state. Therefore, patients with lumbar spinal stenosis are prone to symptoms when standing or walking for long periods of time or maintaining a posterior extension position of the lumbar region for long periods of time; while symptoms are less likely to occur when the lumbar region is flexed, or can be relieved when the lumbar region is flexed after symptoms occur. Spine surgeons call the typical symptoms described above “neurogenic intermittent claudication,” and other diseases that can lead to “intermittent claudication” include “spinal intermittent claudication” caused by spinal cervical spondylosis or thoracic spinal stenosis, and “vascular intermittent claudication” caused by thrombotic vasculitis of the lower extremities, whose clinical symptoms are similar to those of “neurogenic intermittent claudication” caused by lumbar spinal stenosis. The clinical symptoms are different from those of “neurogenic intermittent claudication” caused by lumbar spinal stenosis.