Dog and Cat - Increases flexibility of spine
This is really two poses, one flowing into the other. Begin on your hands and knees. Keep your hands just in front of your shoulders, your legs about hip width apart. As you inhale, tilt the tailbone and pelvis up, and let the spine curve downward, dropping the stomach low, and lift your head up. Stretch gently.
As you exhale, move into cat by reversing the spinal bend, tilting the pelvis down, drawing the spine up and pulling the chest and stomach in. Repeat several times, flowing smoothly from dog into cat, and cat back into dog.