ROTATOR CUFF – EXTERNAL-ROTATION
Click on Image to Enlarge
EMG STUDIES
ANTERIOR-MIDDLE-POSTERIOR DELTOID, INFRASPINATUS, TERES MINOR
– DB Side-Lying Ab-duction, DB External Rotation Elbow in front, Standing with Tube ER
Forearm Position matters during Eccentric Shoulder Exercises: with implications for Rehab – 2020 – Hedt
Procedure
– 5 eccentric exercises of the dominant extremity
– Each exercise was performed with 2-3 forearm positions: supination (thumb up) neutral (thumb neutral), pronation (thumb down)
(A) SL – Side-lying Dumbbell Horizontal Ab-duction Eccentrics: thumb up – thumb neutral – thumb down
(B) Half-Kneeling Weighted Ball Decelerations
(C) Seated Dumbbell External Rotation Eccentrics: elbow in front (scaption) external supported on table – neutral & supinated
(D) STND – Standing Tube External Rotation Eccentrics: elbow tucked @0º pronated grip, neutral grip, supinated grip
(E) Supine Tube External Rotation Eccentrics: elbow @90º pronated grip & neutral grip
Results
Infraspinatus: SL supinated 14%
Teres Minor: SL supinated 6.5%
+ Anterior Deltoid: SL supinated . SL neutral . SL pronated . STND @0º pronated . STND @0º neutral . STND @0º supinated
+ Middle Deltoid: SL supinated 60% . SL neutral 50% . SL pronated 45% . Seated neutral 45% . Seated supinated 35% . STND @0º supinated 30% . STND @0º neutral 30% . STND @0º pronated 30%
+ Posterior Deltoid: Ball 55% . SL supinated 25% . SL neutral 22% . SL pronated 20%
1