Scapular Stabilization

In order to protect the shoulder joint complex when training, you will need to first explain to your client how important the lower trapezius muscles are.  These muscles play a valuable role in what is called "shoulder packing." Simply put, when you pack your shoulder, it feels like you have 'screwed' the upper part of your arm (humeral head) into the shoulder joint (glenoid), while maintaining scapula depression and upward rotation.  Upon overhead lifting, maintaining lower trap engagement will prevent the shoulder and scapula from elevating, which will avoid shoulder injuries/inflammation such as impingement and tendonitis in the long run. 

CLICK FOR EXERCISE VIDEO: http://www.youtube.com/watch?v=SJBlOKaRnfA

Wall Supermans:
     This is a good way to have your client feel the lower traps working.  Keep an eye on their elbows, as your client will attempt to pull down as if performing a lat pulldown.  The arms should remain locked in extension while only the scapulae move down and towards eachother without rotating toward the floor.

Overhead Wall Ball Bounce:
     Now, have your client engage and statically maintain lower trap contraction while using the hands/elbows to bounce the ball overhead.  This is more dynamic, reactive and assists with upper body endurance, particularly of the lower traps which are weak and fatigue quickly on more people than you think

Push Up Shoulder Tap
     This will incorporate core stability as well as scap stability.  Initiate each push up with scap retraction to protect the anterior shoulder joint capsule.  (squeeze your shoulder blades together prior to lowering your body)

Half Get UP
     One of the best for rotator cuff strength, shoulder range of motion (ROM)  and body awareness.  Keep your eyes on the Kettlebell so you do not lose control.

I hope these exercises help you and your client with any shoulder issues