Physical Therapy Evaluation Tool (PEAT) 3 Practice Exam

In lumbar spinal stenosis, symptoms from nerve compression often worsen with standing and walking because the spine tends to extend during these activities, narrowing the already tight canal. Flexion of the spine increases the space in the vertebral canal and foramina, reducing pressure on the nerve roots. Therefore, adopting a forward-flexed posture relaxes the compressed nerves and improves blood flow, making symptoms more tolerable during ambulation. Sitting with the torso flexed leverages that same opening effect, providing the most relief while moving. Standing upright tends to keep the spine extended and can worsen symptoms, while lying flat relieves pressure but isn’t a posture used during ongoing walking, and walking on an incline typically doesn’t promote the flexed position needed for relief.