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In this video, I break down something most lifters completely miss, your shoulder blades control your biceps more than you think.

Everyone asks about lower traps, mid traps, retraction, upward rotation, preacher curls, hammer curls, supination. But if you don’t understand how the scapula actually moves on your ribcage, you’re just guessing.

I explain why pinning your shoulders back during curls can create problems, why thinking about pushing instead of lifting changes everything, and how fixed machine paths should match your joints, not your ego.

0:00 Scapula basics, why retraction is misunderstood
02:00 Upward vs downward rotation explained
03:40 Why levator and rhomboids confuse people
05:28 Why shoulder blades must move during training
06:06 Preacher curl setup, hinge alignment matters
07:45 Carry angle, long head vs short head bias
09:11 Stop lifting, start pushing
10:45 Hammer curl mechanics and spider variation
13:00 Grip mistakes robbing your strength
14:20 Square grip vs palm grip
15:36 Drag curls and shoulder involvement
18:39 Why pinning shoulders back creates problems
20:02 Cable preacher options and mechanical drop sets
22:07 Understanding the “dead zone”
23:38 Cable angle changes tension completely
25:29 You can’t remove pecs and delts from curls
27:22 Concentration curl bracing
30:04 Supination myths explained
31:54 High cable bicep curls
33:35 Machine high curl setup and fitting the equipment

If you deal with elbow pain, wrist pain, uneven tension, or biceps that just don’t feel right, this will clean it up.

Stop isolating pieces.
Start integrating movement.
Match your joints to the machine.
Push the weight through space, don’t just lift it.

Try it. Then tell me what changes.