Lumbar Stenosis Outcomes Research (LUSTOR)

Inclusion Criteria: * Patients must present with clinical symptoms of neurogenic claudication (neurogenic claudication is defined as movement induced leg pain, numbness, heaviness, or vague discomfort in part or all of one or both legs provoked with walking and standing and relieved by sitting, squatting, or forward flexion posturing) and endorse limitation of walking tolerance due to these symptoms * Numeric Rating Scale (NRS) for pain greater than or equal to 6 in response to the following questions: "Circle one number (from 0=no pain to 10=worst pain)-How would you rate the worst leg and lower back pain you experienced during walking last week?" * Patients must have confirmatory imaging by MRI or CT scan demonstrating at least one level of lumbar spinal stenosis within 1 year * Duration of symptoms \> 3 months * Age \> 50 years; male or female Exclusion Criteria: * Past or present existence of movement disorder, e.g., Parkinsonism,or a neurologic disease that might affect the ability to ambulate (e.g., signs/symptoms of cauda equina compression) * Cognitive impairment preventing full understanding or participation in the study * Peripheral vascular disease * Moderate to severe arthritis of the knee or hip that might severely compromise ambulation * Past or present lower extremity peripheral vascular disease * Serious concomitant medical illness (e.g., heart disease) that might impair ambulation assessment * Previous lumbar surgery for spinal stenosis (laminectomy with o…