Assume a kneeling lunge position - with the left knee up and left hip pressed against a wall. Raise both arms to parallel with the floor. Rotate the right arm away from the wall as far as comfortable. Return to start position with both arms together. Next, lift and rotate the left arm along the wall as far as comfortable. Return to start position with both arms together. Repeat the same process facing other direction with the right knee up and right hip pressed against the wall.