Subjects will be between the ages of 18 and 90. Male and female subjects will be recruited into the study. All LSS patients will demonstrate intractable neurogenic claudication and radiographically confirmed lumbar spinal stenosis. Exclusion criteria will be any previous lumbar spine surgery, the existence of significant co-morbidity (e.g. neurologic or cardiac condition, disease, etc.) of any form, and any other physical limitations (musculoskeletal injury) preventing the subject from participating in regular activity and the walking program. Subjects participating will be required to speak English.