We can't start to create up the muscles in your shoulders without knowing what muscles form up your shoulders.

Rotator Cuff - Physiopedia

Human muscle system - Shoulder Muscles, Joints, Movements

The Upper Traps: over-assessed, overblamed, and misunderstood!

The isometric secret: 15 ways to get much fitter – without moving a muscle, Fitness

Get Bigger Shoulders in Four Weeks

How to Get Rid of Broad Shoulders - We Decode the Dos and Don'ts of the Problem - BetterMe

Tight lats and shoulder pain

How To Identify Your Muscle Knots (And Where To Find Them), by AiraWear

4 Exercises That Are Harming Your Shoulder (And What To Do Instead!)

Rotator Cuff: Muscles, Tendons, Function & Anatomy