A grading system is used to rate the instability 1 is the least and 5 the greatest. Most people are in the 1-3 range which rarely requires surgical intervention. Disc lesion is typically cause of pain. Central stenosis encroaches on the spinal cord. and causes bilateral symptoms. Foraminal stenosis encroaches on the nerve root exiting that level and usually presents unilateral.
Spondylolisthesis can contribute to foraminal stenosis when the top vertebrae moves forward.
Forward postures are the most comfortable position. Stenosis is a progressive disease. Get in the most comfortable position. No matter what it may be. Use pillows to hold positions.