Urdhva Dhanurasana or Wheel Pose is one that I have been doing since I was a little kid in PE class.
It requires a very open lower back and shoulders. Keep your thighs and feet parallel and turn your upper thighs slightly inward. Shoulder blades spread across your back..engage your core to take you into a deeper backbend.
Wheel pose can be easily modified by coming into a bridge pose.
from Lo Mays http://ift.tt/1n63jA0