 Lumbar spinal stenosis is a prevalent and disabling condition in elderly individuals. Lumbar spinal stenosis results in lumbar andor radicular leg pain when standing and walking, while symptoms regress in lumbar flexion positions and at rest. The inability to stand or walk impairs functioning and health-related quality of life of elders, and has an important healthcare cost. The 2 main treatment options for lumbar spinal stenosis are conservative or surgical. Laminectomy may be more effective on pain and function than conservative therapy. However, the benefit-risk balance of surgery should be considered in this population with numerous co-morbidities, and evidence is inconsistent. Therefore, conservative therapy is usually the first line option to avoid or delay surgery. Data regarding exercise therapy are scarce. Lumbar-flexion-based exercises are usually recommended. A pilot study suggested that lumbar-flexion-based endurance training, namely cycling, could be an effective and safe method to improve pain, function and health-related quality of life in elderly patients with chronic low back pain but barriers to adhering to the program were detected. Investigators aim to assess barriers and facilitators to a 3-month home-based cycling program in lumbar spinal stenosis. 