VARIATIONS ON BRIDGE POSE
This posture is often done to prepare the shoulders for Shoulderstand.
It can be done holding the ankles, or with the hands placed on the floor, or with the hands clasped together under the body and squeezing the shoulderblades together as the arms stretch toward the feet. This last variation relieves shoulder and neck tension.

Another variation, which intensifies the arch in the back and stimulation of the thyroid,  has the support of the hands.

While supporting with the hands, you can also extend the legs out away from the body.

Finally, you might want to add a leg raise!

Always release the pose by bringing the feet back into position under the knees, and slowly lowering the back to the floor. Counterpose by curling up into Upward Facing Child, and gently rocking from side to side.