Viparita Dandasana (Inverted Staff Pose), supported

Sit backward through a folding chair, preferably one that has a large opening in the backrest so that you 
have ample space for your legs. Holding on to the sides of the top of the chair, lift and broaden the chest while lying backward over the seat. The edge of the chair seat should support you near the middle of the back. Rest the top of your head on a bolster or folded blankets. Straighten and extend the legs. Open the chest and move your arms in between the front legs of the chair to grasp the back legs of the chair.

If you cannot straighten your legs, raise your heels onto blocks or some other support. Hold for 5 minutes. To come out of the pose, hold near the top of the chair, bend your knees, put your feet flat on the floor, and keep your chest open as you pull yourself up. Once upright, stay for a few moments with your eyes closed.