Adho Mukha Vrksasana (Hand stand) strengthens shoulders and upper back. It also energizes and invigorates the body and mind. Some things to help you with the pose are to press the base of fingers down evenly - even weight between heels of palms and knuckles. Gaze at the floor between hands to open the chest. Shoulders directly over the heel of the hand - firm outer upper arms in. Draw trapezius muscle away from the neck - firm the shoulder blades in toward the back ribs. Keep the front ribs soft. Align hips over shoulders. Lift buttock flesh up toward the heels - hug outer hips in toward the midline of the body. Feet together reaching up through the big toe. A great way to try this pose is against a wall. It takes some time to feel comfortable upside down so don't put too much pressure on yourself.