Precaution:
Time yourself so that you can do the complimentary posture for half the time of this posture.

Preparation:
Lie down on your back, perpendicular to the wall, with your buttocks touching the base of the wall and legs extended up along the height of wall. Slowly, push the wall with the feet so that your lower legs are parallel to the floor and perpendicular to the wall. This will make rest of your body from knees up to the shoulders parallel to the wall. Now, push the wall to attain the posture.

Feel the pressure of your chin touching your chest. Try to breathe slowly in and out for at most 50 breaths or 2 and half minutes, whichever is shorter.

Slowly bring your buttocks to the floor first; then place sole of your feet on the wall, and very gently come to starting and then finally to the sleeping pose on the floor.

Sarvãngãsana:
Slowly roll your knees to the chest and raise your buttocks. Hold your back supported by your palms and gently extend your legs up in the air, trying to keep them perpendicular to the floor.

Feel the pressure of your chin touching your chest. Try to breathe slowly in and out for at most 50 breaths or 2 and half minutes, whichever is shorter.

Precaution:
Do not lift up your neck while coming off the ãsana.