Come to hands and knees with your hands shoulder-width apart, knees hip-width apart, abs engaged, and back flat (spine neutral).
Engage your abdominals as if pulling your navel towards your spine and round your back towards the ceiling. Allow the head and neck to fall naturally between the arms.
Breathe deeply and hold for 10-30 seconds.
Stretch to the point of "mild discomfort," not to the point of pain. Never bounce. Keep the abdominals pulled in tightly and your pelvic bone slightly tucked under. Pull your shoulders away from your ears. This is a good compliment to the "Camel Stretch."
Muscles Stretched: Back