History of metastatic cancer• Cauda equina symptoms including saddle paresthesia• Previous lumbar surgery for LSS or lumbar spinal fusion• History of severe peripheral artery disease or Ankle Brachial Index < 0.8• Have been told by a physician that they should not engage in physical exercise• History of neurologic (e.g., cervical myelopathy, stroke) or neuro-degenerative (e.g., Parkinson’s disease) other than LSS that affects the subject’s ability to walk• Cannot complete a self-paced walking test (SPWT) for any reason other than symptoms related to LSS (e.g. chest pain, severe hip or knee arthritis, dizziness, etc.)• Cannot complete SPWT without need for an assistive device
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