I would also suggest throwing in some high rep movements going for about 100 a day (not at once). Using non weighted or very very light weight external roataions, scapula retraction, scapula depressions and also work on you pec, lat, serratus anterior and anterior head of the deltoid stretches both dynamic and static. All can be tight and as they are internal rotators they will cause a dysfunctional shoulder along with weak scapula retractors and weak rotator cuff muscles.
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