This document describes the Marichyasana pose, a seated spinal twist. It instructs to sit with legs stretched out, bend one knee and place the foot flat on the floor while twisting the spine 90 degrees to the side and extending the opposite arm over the bent knee. Hold for 30 seconds on each side while breathing easily. Regular practice of this pose provides benefits such as relief from back pain, toned organs, strengthened neck muscles, and reduced abdomen size. Pregnant women or those with abdominal surgery should avoid it.