Lie flat on your back with your legs extended and your arms stretched overhead.
Relax the abs and imagine stretching through the center of your body, reaching your toes and fingertips towards opposite sides of the room.
Breathe deeply and hold for 10-30 seconds.
Stretch to the point of "mild discomfort," not to the point of pain. Never bounce. Dont allow your lower back to arch off of the mat.
Muscles Stretched: Abs, shoulders