From an article by Don Alessi:
Here?s a routine to correct scapular winging:
Push press, barbell: The push press is a shoulder press that utilizes the entire body. Start by standing, with a shoulder-width grip and the barbell resting on anterior delts. Squat one-fourth of the way down to initiate the momentum. Next, press the bar straight over the head to a soft lockout while exploding up on to the toes. Finish by lowering the weight to your shoulders.
L-lateral raise, dumbbell: Same as a traditional lateral raise, except the elbows are bent at 90 degrees during the lift. Additionally, there?s an external rotation motion of the lower arm that follows the 90- degree abduction. In other words, as you complete the "lateral raise" portion of the movement, rotate the lower arm up and outward (while maintaining the 90-degree angle throughout the exercise and keeping the wrists neutral).
Incline front raise, dumbbell, semi-supinated: This is pretty much the same as a conventional front raise, except that you?ll use a semi-supinated grip and you?ll be doing the front raises at an angle. Grab a pair of dumbbells with your palms facing each other. Lie on an incline bench set to 45 degrees. With the elbows slightly bent, raise the dumbbells from the bottom position (at your side) to a perpendicular angle to the bench. Lower the weight under control to a dead stop before proceeding.
If indeed you do have scapular winging, you need to do the following routine 2 times a week for 4 weeks. It should also replace your current back routine:
Exercise Sets Reps Rep Speed Rest Interval
A. Push press* 5 3-5 30X 180 sec.
B1** L-lateral raise 3 10-12 501 0 sec.
B2 Incline front raise,DB 3 10-12 501 60 sec.
* Stretch the traps and neck in between sets.
**B1 and B2 means to do the L-lateral raises, and then, without resting, proceed to the incline front raises. You?d do that 3 times.
here is the article link: