You can find this exercise on page 149 of the book Synergistic Golf.
Exercise Type: PILATES
Exercise Category: ABDOMINALS, BALANCE, POSTURE, STRENGTH
Lie on back with arms overhead. Knees bent and feet flat on floor approximately 12-18 inches away from hips and hip width apart. Inhale reaching arms to ceiling and keeping spine and back of ribcage flat on floor. Exhale rolling up one vertebrae at a time to balance just back of tailbone. Arms reach forward on a diagonal. Inhale reach arms by ears without changing spine shape. Exhale roll down with control. Complete 8-10 repetitions.