GIRD (glenohumeral IR deficit) is considered a major contributor to GH instability & medial elbow injury in baseball pitchers. The cause is believed to be the tremendous traction placed on the posterior shoulder during the follow through phase. Most of the treatment I've seen to date is directed at the posterior joint capsule itself. We kinetic link enthusiasts insist on looking deeper. What if some other link is not doing it's job & over taxing the shoulder? Like:
1. Stiffness of the contralateral anterior shoulder.
2. Frontal/Transverse T-spine stiffness.
3. Trail leg ABD,IR stiffness.
4. Lead leg cavus foot.
5. Limitation of R cervical rotation (in a R handed pitcher).
Or, what I'm working on here: Limitation of L femoral IR. I've changed the position of the lead foot a little bit by placing it in neutral rotation. My R hand is mobilizing the R ilium into L rotation (as if I were opening a jar lid). My L hand is gently slowing down that L femur from bailing out into external rotation. The authentic drivers I'm using are the athlete's R hand & foot.